Question

There are 28 total students in Mr. Flynn’s class. The ratio of his students who are in the play to those who are not in the play is 2.5. How many of Mr. Flynn’s students are in the play?

Answer 1

First, you calculate the total amount of parts : 2 + 5 = 7
Next, divide the number by the total amount of parts : 28 ÷ 7 = 4
After that, you multiply the answer by the amount of parts needed on both sides of the ratio : 4 × 2 = 8 and 4 × 5 = 20
Finally put these answers back into the ratio : 8:20
So there are 8 students in the play

To check, make sure both sides of the ratio add up to the original number : 8 + 20 = 28