Question

The ratio of girls to boys is 5:3 in a class. If there are 15 girls in the class, what is the class size? What is the unit ratio?

Answer 1

Try setting up a proportion:
`(5)/(15)=(3)/(x)` then cross multiply to solve for x which will try you how many boys are in the class. Then add the number of boys and girls together.

Explanation: