Question

At Lake Middle School, the average ratio of boys to girls in a classroom is 3:2. Use a proportion to predict the number of girls in a classroom that has 15 boys

Answer 1

15/3 = 5  
5 * 2 = 10  
There are 15 boys and 10 girls in the classroom.

Answer 2

There are 3 boys to 2 girls

There are 15  boys

15/3 = 5

5 x 2 = 10

there are 10 girls in the classroom with 15 boys

hope this helps