Question

In this year’s 7th grade class, there are 4 boys for every 5 girls. How many girls are in the class if there are 20 boys in the class?

Answer 1

25girls

Explanation:

4b=5g

20b=25g

4b/20b=5g/?

5g x 20b=100

100/4b=25g

Answer 2

No. of girls =25

Explanation:

Ratio of boys: girls = 4:5

No. of boys = 4x

No. of girls = 5x

4x = 20 ( No.of boys = 20)

x = 20/4

x = 5

No. of girls = 5x = 5 * 5 =25