Question

In Hackensack High School, the ratio of students to teachers is 9 to 2. If there

are 90 teachers at the High School, how many students are there?

Answer 1

Explanation:

students : Teachers

9 : 2

? : 90

students = 9 x 90 ÷ 2

students = 405

Answer 2

I guess the answer is 405.

Because the value of 1 is 45 and 2×45 =90

9×45=405.

Hope it helps you:)