1. There are 15 girls and 12 boys in Mrs. Johnson's mathclass. Express the ratio of boys to girls in simplest form.

4 : 5

Step-by-step explanation:

boys : girls

12 : 15

Divide each by 3

12/3 : 15/3

4 : 5

4/5

Step-by-step explanation:

The ratio of boys to girls is eqaul to boys/girls so the number of boys is 12 and the number of girls is 15. So the unsimplifies anwser is 12/15.

we simplify by dividing both sides by 3 to get 4/5 that is the anwser.