Question

If there are 10 boys to 7girls, how many boys are there when there are 21 girls?​

Answer 1

30 boys

Explanation:

10 boys to 7 girls= 10:7

Blank boys :21 girls

7x3=21

10x3=30

Blank=30

30 boys : 21 girls

Answer 2

30 I hope this helps!!