In my tank,The ratio of red fish to blue fish is 3:5, There are 20 blue fish How many red fish are there

There are 12 red fish.

If the ratio of red fish to blue fish is 3:5, this means that for every 3 red fish, there are 5 blue fish.

We know that there are 20 blue fish in the tank, so we can use this information to find the number of red fish.

First, we can determine the ratio of red fish to blue fish as a fraction:

3/5

This means that for every 5 blue fish, there are 3 red fish.

To find the number of red fish, we can set up a proportion:

3/5 = x/20

where x is the number of red fish in the tank.

To solve for x, we can cross-multiply:

5x = 60

x = 12

Therefore, there are 12 red fish in the tank.