Question

There are 15 girls in your class this year. That is a 15% increase from last year. a. Write a proportion to solve for the number of girls in the class last year. b. Solve the proportion in part (a).

Answer 1

Step-by-step explanation:

Let x = the number of girls in the class last year.

Then from the condition, you have this equation

%2815-x%29%2Fx = 0.15.

Solve it for x

15 - x = 0.15x

15 = 0.15x + x

15 = 1.15x

x = 15%2F1.15 = 13.043.

Round to the closest integer x= 13. ANSWER