Mothers Against Drunk Driving (MADD) is a very visible group whose main focus is to educate...

Mothers Against Drunk Driving (MADD) is a very visible group whose main focus is to educate the public about the harm caused by drunk drivers. A study was recently done that emphasized the problem we all face with drinking and driving. Five hundred accidents that occurred on a Saturday night were analyzed. Two items noted were the number of vehicles involved and whether alcohol played a role in the accident. The numbers are shown below:

               Number of Vehicles Involved
Did alcohol play a role?    1    |   2    |   3
Yes                60    |   110    |   30    =   200
No                40    |   215    |   45    =   300
               ______________________
               100    |   325    |   75

Given alcohol was involved, what proportion of accidents involved a single vehicle?
Place your answer, rounded to 2 decimal places, in the blank. For example, 0.23 is a legitimate entry.