Dosage Calculations A Multi-Method Approach.docx

Dosage Calculations: A Multi-Method Approach Nursing/Integrated Concepts Question 1 Write the following as a mixed number: 17/4. 1. 4 1/4 2. 4 3. 64 4. 20 Correct Answer: 1 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Divide the numerator by the denominator or 17÷4 = 4 with 1 left over so the answer is 4 with the 1 remainder over 4 or ¼ Question 2 Write the following as a mixed number: 36/7. 1. 4 6/7 2. 5 1/7 3. 4 1/7 4. 5 Correct Answer: 2 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Divide the numerator by the denominator: 36÷7 = 5 with a remainder of 1 or 5 1/7 Question 3 Write the following as a mixed number: 7/2. 1. 4 1/2 2. 5 1/2 3. 3 1/2 4. 3 Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Divide the numerator by the denominator: 7÷2= 3 with 1 remaining or 3 1/2 Question 4 Write the following number as an improper fraction: 8 5/6. 1. 53/6 2. 40/6 3. 53/8 4. 45/6 Correct Answer: 1 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Multiply the whole number by the denominator, and add the numerator. 8×6 = 48+5= 53. Place this number over the denominator or 53/6 Question 5 Write the following number as an improper fraction: 5 5/6. 1. 35/6 2. 30/6 3. 25/6 4. 41/6 Correct Answer: 1 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Multiply the whole number by the denominator and add the numerator: 5 × 6 =30 + 5 = 35. Place this number over the denominator: 35/6 Question 6 Write the following number as an improper fraction: 8 1/3. 1. 11/3 2. 24/3 3. 8/3 4. 25/3 Correct Answer: 4 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Multiply the whole number by the denominator and add the numerator: 8×3=24 +1 =25 Place this number over the denominator: 25/3 Question 7 Write 0.125 as a fraction in lowest terms and as a percentage. 1. 125/100; 1.25% 2. 25/100; 25% 3. 1/6; 12.5% 4. 1/8; 12.5% Correct Answer: 4 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Write one hundred twenty-five thousandths as 125/1000, and then reduce the fraction to 1/8. Move the decimal two places to the right yielding 12.5% Question 8 Write 0.2 as a fraction in lowest terms and as a percentage. 1. 1/50; 2% 2. 1/5; 20% 3. 2/100; 0.2% 4. 1/500; 0.002% Correct Answer: 2 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Write 2 tenths as 2/10 and reduce to 1/5. Move the decimal point 2 places to the right yielding 20% Question 9 Write 0.49 as a fraction in lowest terms and as a percentage. 1. 49/100; 49% 2. 7/15; 49% 3. 49/100; 4.9% 4. ½; 4.9% Correct Answer: 1 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Write 0.49 as 49/100 which cannot be reduced further. Move the decimal point 2 places to the right to yield 49% Question 10 Write 0.75 as a fraction in lowest terms and as a percentage. 1. 75/100; 75% 2. 15/20; 7.5% 3. 15/20; 75% 4. ¾; 75% Correct Answer: 4 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Write 0.75 as 75/100 and reduce to ¾. Move the decimal point 2 places to the right to yield 75% Question 11 Write 0.06 as a fraction in lowest terms and as a percentage. 1. 3/50; 60% 2. 6/10; 6% 3. 3/50; 6% 4. 3/5; 6% Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Write 0.06 as 6/100 and reduce to 3/50. Move the decimal point 2 places to the right to yield 6%. Question 12 Write 55% as a decimal number and a proper fraction in lowest terms. 1. 5.5; 55/100 2. 0.055; 55/1000 3. 0.55; 11/20 4. 0.0055; 11/200 Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Move the decimal 2 places to the left or 0.55, place 55 over 100 and reduce to 11/20 Question 13 Write 72% as a decimal number and a proper fraction in lowest terms. 1. 7.2; 72/1000 2. 7.2; 72/100 3. 0.72; 36/50 4. 0.72; 18/25 Correct Answer: 4 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Move the decimal 2 places to the left or 0.72. Place 72 over 100 and reduce to 18/25 Question 14 Write 0.6% as a decimal number and a proper fraction in lowest terms. 1. 3/50; 0.06 2. 6/100; 0.60 3. 1/17; 0.06 4. 3/500; 0.006 Correct Answer: 4 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Move the decimal 2 places to the left or 0.006, place 6 over 1000 and reduce to 3/500 Question 15 Write 4.5% as a decimal number and a proper fraction in lowest terms. 1. 0.45; 45/100 2. 0.045; 9/200 3. 0.0045; 45/10,000 4. 0.045; 45/1,000 Correct Answer: 2 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Move the decimal 2 places to the left or 0.045, place 45 over 1000 and reduce to 9/200 Question 16 Write 25% as a decimal number and a proper fraction in lowest terms. 1. 2.5; 1/40 2. 0.025; 5/200 3. 0.25; 1/4 4. 0.25; 25/100 Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Move the decimal 2 places to the left or 0.25, place 25 over 100 and reduce to 1/4 Question 17 Write 3/5 as a decimal number and a percent. 1. 0.0166; 1.66% 2. 0.6; 60% 3. 0.15; 15% 4. 0.3; 30% Correct Answer: 2 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Divide the denominator into the numerator: 3÷5 = 0.6. Move the decimal point two places to the right yielding 60% Question 18 Convert 5/8 to a decimal number and a percent. 1. 1.6; 160% 2. 0.4; 40% 3. 0.625; 62.5% 4. 0.45; 45% Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Dividing the denominator into the numerator: 5÷8=0.625. Move the decimal point two places to the right yielding 62.5% Question 19 Convert 9/19 to a decimal number rounded off to the nearest tenth, and to a percentage rounded off to the nearest tenth of a percent. 1. 0.5; 47.4% 2. 0.47; 4.8% 3. 0.02; 2.1% 4. 0.4; 47.4% Correct Answer: 1 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Divide the denominator into the numerator. 9÷19 = 0.4736… rounded off to 0.5. Move the decimal point two places to the right yielding 47.4% Question 20 Write 3/5 as a decimal number and a percent. 1. 1.67; 167% 2. 0.6; 60% 3. 0.167; 16.7% 4. 0.06; 6% Correct Answer: 2 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Question 21 Reduce 36/48 to lowest terms. 1. 12/18 2. 18/24 3. 9/12 4. 3/4 Correct Answer: 4 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Divide numerator and denominator by 12 yielding 3/4. Question 22 Reduce 95/100 to lowest terms. 1. 4/5 2. 19/20 3. 24/25 4. 9.5/10 Correct Answer: 2 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Divide numerator and denominator by 5 yielding 19/20. Question 23 Reduce 24/36 to lowest terms. 1. 12/18 2. 3/4 3. 2/3 4. 6/9 Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Divide numerator and denominator by 12 yielding 2/3. Question 24 Reduce the ratio 18:54 to a fraction in lowest terms. 1. 18/54 2. 1/3 3. 3/4 4. 1/2 Correct Answer: 2 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Convert the ratio to 18/54 and reduce to 1/3. Question 25 Reduce the ratio 10:75 to a fraction in lowest terms. 1. 1/7.5 2. 5/15 3. 2/15 4. 1/3 Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Convert the ratio to 10/75 and reduce to 2/15. Question 26 Reduce the ration 12:24 to a fraction in lowest terms. 1. 1/3 2. 6/18 3. 2/4 4. 1/2 Correct Answer: 4 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Convert the ratio to 12/24 and reduce to 1/2. Question 27 Write 5/8 as an equivalent fraction with 96 in the denominator. 1. 96/154 2. 65/96 3. 60/96 4. 5/96 Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: 5/8 × 12/12 = 60/96 Question 28 Write 4/5 as an equivalent fraction with 100 in the denominator. 1. 100/80 2. 5/100 3. 75/100 4. 80/100 Correct Answer: 4 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: 4/5 × 20/20 = 80/100 Question 29 Write 17/20 as an equivalent fraction with 100 in the denominator. 1. 85/100 2. 34/100 3. 4/100 4. 100/85 Correct Answer: 1 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: 17/20 × 5/5 = 85/100 Question 30 Write 1/5 as an equivalent fraction with 25 in the denominator. 1. 25/5 2. 25/20 3. 5/25 4. 1/25 Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: 1/5 × 5/5 = 5/25 Question 31 Write 3/4 as an equivalent fraction with 100 in the denominator. 1. 75/100 2. 80/100 3. 100/25 4. 100/75 Correct Answer: 1 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: ¾ × 25/25 = 75/100 Question 32 Round off 6.892489 to the hundredths place. 1. 6.9 2. 6.89 3. 6.8 4. 6.892 Correct Answer: 2 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: The digit following the hundredths place is 2, so leave 6.89 alone Question 33 Round off 17.456 to the tenths place. 1. 17.5 2. 17.4 3. 17.46 4. 17.56 Correct Answer: 1 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: The digits following the tenths place is 5 so add 1 to 4 yielding 17.5 Question 34 Round off 3.5243 to the tenths place. 1. 3.6 2. 3.4 3. 3.5 4. 3.52 Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: The digit following the tenths place is 2 so leave the 5 alone yielding 3.5 Question 35 Round down 9.6723 to the tenths place. 1. 9.7 2. 9.6 3. 9.67 4. 9.72 Correct Answer: 2 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: The digit in the tenths place is 6, delete the remaining digits. Question 36 Round down 4.2894 to the hundredths place. 1. 4.3 2. 4.29 3. 4.28 4. 4.2 Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: The digit in the hundredths place is 8, delete the remaining digits. Question 37 Round down 4.0678 to the tenths place. 1. 4 2. 4.1 3. 4.06 4. 4.07 Correct Answer: 2 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: The digit in the tenths place is 1, delete the remaining digits. Question 38 Add 4.55 and 0.035. 1. 4.9 2. 4.5035 3. 4.585 4. 4.515 Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Line up the decimal points and add. Question 39 Add the following decimal numbers: 10.1 + 3.964. 1. 14.064 2. 13.974 3. 13.064 4. 14.974 Correct Answer: 1 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Line up the decimal points and add. Question 40 Add 4.834 + 3.962 + 1.083. 1. 8.879 2. 9.793 3. 9.879 4. 8.793 Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Line up the decimal points and add. Question 41 Subtract 1.864 from 3.691. 1. 1.827 2. 1.823 3. 2.827 4. 0.827 Correct Answer: 1 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Line up the decimal points and subtract. Question 42 Subtract 0.068 from 5.543. 1. 4.863 2. 5.475 3. 5.863 4. 5.5362 Correct Answer: 2 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Line up the decimal points and subtract. Question 43 Subtract 2.4 from 10. 1. 7.6 2. 12.40 3. 9.76 4. 12.4 Correct Answer: 1 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Line up the decimal points and subtract. Question 44 Solve the following problem: 3.29 × 1.64. Round off the answer to the tenths place. 1. 5.4 2. 5.3 3. 53.4 4. 54.2 Correct Answer: 1 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: 3.29 × 1.64 =5.3956 then round off to 5.4 Question 45 Multiply 2.87 by 0.064 and round off to the hundredths place. 1. 0.19 2. 0.183 3. 0.1837 4. 0.18 Correct Answer: 4 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: 2.87 × 0.064 = 0.18368 rounded off to the hundredth place is 0.18 Question 46 Multiply 2.4 by 0.5. 1. 1.2 2. 12 3. 0.12 4. 120 Correct Answer: 1 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: 2.4 × 0.5 = 1.2 Question 47 Solve the following problem: 0.68 ÷ 0.4. 1. 170 2. 17 3. 1.7 4. 0.17 Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Move the decimal point one place to the right on each number, then divide 6.8 by 4 = 1.7 Question 48 Divide 8.6 by 0.5. 1. 1.72 2. .172 3. 17.2 4. 172 Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Move the decimal point one place to the right on each number then divide 86 by 5 = 17.2 Question 49 Divide 8.6 by 0.02. 1. 0.172 2. 4.3 3. 430 4. 0.43 Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Move the decimal point two places to the right and then divide 860 by 2=430 Question 50 Multiply 0.089 by 1,000. 1. 89 2. 8.9 3. 0.89 4. 0.089 Correct Answer: 1 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Move the decimal point three places to the right Question 51 Multiply 0.84 by 100. 1. 8.4 2. 84 3. 840 4. 0.084 Correct Answer: 2 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Move the decimal point two places to the right yielding 84. Question 52 Multiply 34.2 by 100. 1. 3.42 2. 342 3. 3,420 4. 34,200 Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Move the decimal point two places to the right yielding 3420 Question 53 Divide 0.89 by 100. 1. 8.9 2. 0.89 3. 0.089 4. 0.0089 Correct Answer: 4 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Move the decimal point two places to the left yielding 0.0089 Question 54 Divide 1.24 by 10. 1. 0.0124 2. 0.124 3. 12.4 4. 124 Correct Answer: 2 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Move the decimal point one place to the left yielding 0.124 Question 55 Divide 566.8 by 1,000. 1. 5,668 2. 56.68 3. 5.668 4. 0.5668 Correct Answer: 4 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Move the decimal point three places to the left. Question 56 Write the numbers 0.289, 0.395, 0.0289, and 0.0395 in order of size from smallest to largest. ______ Standard Text: Correct Answer: 0.0289; 0.0395; 0.289; 0.395 Rationale : Put in a column and line up the decimal points. Question 57 Write the numbers 0.003, 0.034, 0.38, and 0.0003 in order of size from smallest to largest. ______ Standard Text: Correct Answer: 0.0003; 0.003; 0.034; 0.38 Rationale : Place the numbers in a column and line up the decimal points. Question 58 Write the numbers 0.3, 0.4, 0.33, and 0.111 in order of size from smallest to largest. ______ Standard Text: Correct Answer: 0.111; 0.3; 0.33; 0.4 Rationale : Place the numbers in a column and line up the decimal points. Question 59 Which is larger: 0.21 or 0.7? ______ Standard Text: Correct Answer: 0.7 Rationale : 0.7 is larger than 0.21. Question 60 Which is larger: 2.45 or 2.6? ______ Standard Text: Correct Answer: 2.6 Rationale : 2.6 is larger than 2.45. Question 61 Which is largest: 0.3, 0.33, or 0.198? ______ Standard Text: Correct Answer: 0.33 Rationale : 0.33 is larger than both 0.3 and 0.198. Question 62 Add 5 7/8 and 3 1/4. 1. 8 3/4 2. 9 1/8 3. 9 1/4 4. 8 1/4 Correct Answer: 2 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Convert both denominators to 8 then add 5 7/8 + 3 2/8 = 8 9/8 = 9 1/8 Question 63 Add 6 1/2 and 2 3/8. 1. 8 7/8 2. 9 3. 8 12/16 4. 9 1/4 Correct Answer: 1 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Convert both denominators to 8 then add 6 4/8 + 2 3/8 = 8 7/8 Question 64 Add 3 3/4 and 7 1/2. 1. 10 1/4 2. 10 3/4 3. 11 1/2 4. 11 1/4 Correct Answer: 4 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Convert both denominators to 4 then add: 3 ¾ + 7 2/4 = 10 5/4 or 11 1/4 Question 65 Subtract 1 3/4 from 2 3/8. 1. 1 3/8 2. 1 5/8 3. 5/8 4. 1 Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Convert both denominators to 8, then subtract 2 3/8 – 1 6/8= 5/8 Question 66 Subtract 1½ from 4 3/4. 1. 4 1/4 2. 3 1/2 3. 2 3/4 4. 3 1/4 Correct Answer: 4 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Convert both denominators to 4, then subtract 4 ¾ – 1 2/4 = 3 ¼ Question 67 Subtract 2 7/8 from 7 1/4. 1. 5 5/8 2. 4 5/8 3. 4 3/8 4. 5 3/8 Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Convert both denominators to 8 then subtract 7 2/8 – 2 7/8 Question 68 Solve the following problem and write the answer in lowest terms: 16/21 × 7/8 × 1/2. 1. 112/336 2. 64/147 3. 1/3 4. 1 109/147 Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Cancel before multiplying yielding 1/3 Question 69 Solve the following problem and write the answer as a mixed number in lowest terms: 7/8 × 3/4 × 3/16. 1. 63/576 2. 7/64 3. 7/64 4. 63/512 Correct Answer: 4 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Multiply the numerators (7 × 3 × 3) = 63. Multiply the denominators (8×4×16) = 512 and place the numerator over the denominator yielding 63/512. Question 70 Solve the following problem and write the answer in lowest terms: 3/5 × 4/15 × 25/24. 1. 300/1,800 2. 30/180 3. 3/18 4. 1/6 Correct Answer: 4 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Cancel before multiplying yielding 1/6 Question 71 Solve the following problem and write the answer as a mixed number in lowest terms: 8/11 ÷ 4/9. 1. 36/99 2. 2/11 3. 1 7/11 4. 1 28/44 Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Invert the second fraction and multiply (8/11× 9/4 = 18/11) and change to 1 7/11 Question 72 Solve the following problem and write the answer in lowest terms: 3/4 ÷ 7/8. 1. 21/32 2. 24/32 3. 6/7 4. 24/28 Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Invert the second fraction and multiply. Question 73 Solve the following problem and write the answer as a whole number or fraction in the lowest terms: 3/200 ÷ 11/300. 1. 9/22 2. 3/7 3. 33/6,000 4. 900/2,200 Correct Answer: 1 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Invert the second fraction and multiply. Question 74 Simplify the following complex fraction: 3/4 / 7/8 1. 1/2 2. 2/3 3. 3/4 4. 6/7 Correct Answer: 4 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Write as a division problem: ¾ ÷ 7/8 invert the second fraction and multiply: ¾ × 8/7 = 6/7 Question 75 Simplify the following complex fraction: 4/5 / 8/9 1. 2/35 2. 9/10 3. 36/40 4. 32/45 Correct Answer: 2 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Write as a division problem: 4/5 ÷ 8/9, invert the second fraction and multiply. Question 76 Simplify the following complex fraction: 1/4 / 1/2 1. 1/8 2. 1/4 3. 2 4. 1/2 Correct Answer: 4 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Write as a division problem: 1/4 ÷ 1/2, invert the second fraction and multiply. Question 77 Simplify the following complex fraction and write as a mixed number in lowest terms: 4/5 / 3/4 1. 1 1/15 2. 3/5 3. 16/15 4. 12/20 Correct Answer: 1 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Write as a division problem: 4/5 ÷ 3/4, invert the second fraction and multiply. Question 78 Simplify the following complex fraction and write in lowest terms: 1/2 / 3/4 1. 3/8 2. 4/6 3. 2/3 4. 1 1/3 Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Write as a division problem: 1/2 ÷ 3/4, invert the second fraction and multiply. Question 79 What is 32% of 25? 1. 800 2. .78 3. 7.8 4. 8 Correct Answer: 4 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Multiply 0.32 by 25 yielding 8 Question 80 What is 20% of 19? 1. 38 2. 3.8 3. 98 4. 0.95 Correct Answer: 2 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Multiply 0.2 by 19 yielding 3.8 Question 81 What is 80% of 110? 1. 88 2. 1.375 3. 0.72 4. 8800 Correct Answer: 1 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Multiply 0.8 by 110 yielding 88 Question 82 What is 0.87% of 30? 1. 26.1 2. 0.261 3. 2.9 4. 0.34 Correct Answer: 2 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Multiply 0.0087 by 30 yielding 0.261 Question 83 What is 20% of 50? 1. 0.4 2. 100 3. 10 4. 2.5 Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Multiply 0.2 by 50 yielding 10 Question 84 The client was taking 250 mg of ampicillin every six hours. The doctor increased the dosage to 400 mg every six hours. What percentage of change was made in the dosage? ______% Standard Text: Correct Answer: 60 Rationale : Fraction of change = change in dose/old dose = 150/250 = .6, or 60% increase in dosage. Question 85 The client's dosage of Lanoxin (digoxin) was changed from 0.125 mg to 0.5 mg. What percentage was the dosage increased? 1. 0.25 % 2. 40% 3. 400% 4. 300% Correct Answer: 4 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Fraction of change = change in dose/old dose = 0.375/0.125 = 3 0r 300% increase in dosage. Question 86 A dosage is changed from 4 mg per day to 6 mg per day. Find the percentage of increase. 1. 150% 2. 67% 3. 50% 4. 33% Correct Answer: 3 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Fraction of change = change in dose/old dose = 2/4 = .5 or 50% increase in dosage. Question 87 The old price was $19.95. The sale price is $11.97. What is the percentage discount? 1. 20% 2. 40% 3. 60% 4. 80% Correct Answer: 2 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Fraction of discount = Change in price/old price = 7.98/19.95=0.4 or 40% Question 88 The client's dosage of Tenormin (atenolol) is reduced from 75 mg to 60 mg. What is the percentage decrease? 1. 67% 2. 15% 3. 150% 4. 20% Correct Answer: 4 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Fraction of change = change in dose/old dose = 15/75 = .2 or 20% decrease in dosage. Question 89 A dosage is changed from 12 mg per day to 9 mg per day. What is the percentage decrease? 1. 25% 2. 13% 3. 75% 4. 33% Correct Answer: 1 Rationale 1: Rationale 2: Rationale 3: Rationale 4: Global Rationale: Fraction of change = change in dose/old dose = 3/12 = .25 or 25% decrease in dosage.