There are 15 boys and 20 girls in the 7th grade class.

What is the ratio of boys to girls in simplified form?

15 : 20 = 3 : 4

Step-by-step explanation:

We can simplify the ratio 15 : 20 by dividing both terms by the greatest common factor (GCF).

The GCF of 15 and 20 is 5.

Divide both terms by 5.

15 : 5 = 3

20 : 5 = 4

Therefore:

15 : 20 = 3 : 4

30 girls 20 boys

Step-by-step explanation:

b = number of boys = 20

g = number of girls

b/g = 10/15 = 2/3

g = b / (2/3) = 20 / (2/3) = 60/2 = 30

30 girls, 20 boys