Question

Out of the 32 students in Mr. Martin’s class, 18 are boys. If this ratio is proportional to the ratio of students in the school and the number of boys in the school, which of the following proportions could could be used to find the number of students in the school? It is given that there are 468 boys in the school.

Answer 1

9:16

Explanation:

18:32 is the ratio for boys

First, you find what number you need to multiply 18 by to get 468. You do this by dividing 468 and 18, getting 26

You multiply 36 by 26, which gives you the answer

The proportion used is the one above, but you can simplify