Homework for my son

Question

Ratio of boys to girls 4:3 there are 24 boys how how many girls are in the class

Answer 1

4/7 of the class are boys and 3/7 are girls

there are ? students in the class

4/7 * ? = 24

? = 24*7/4

= 6*7

= 42

There are 42 students in the class

24 are boys, and 18 are girls

note that 18/42 = 3/7