Question

Percent Increase and Decrease Quiz if the average grade of an English class rose from 70 to 85 what is the approximate percent increase

Answer 1

To find the percent of increase, use the following formula.

$p=\frac{B-A}{A}\cdot100$

Where B is the final value and A is the original value.

In this case, the original value is 70 and the final is 85, use them to find the percent increase:

$\begin{gathered} p=\frac{85-70}{70}\cdot100 \\ p=\frac{15}{70}\cdot100 \\ p=21.43 \end{gathered}$

The percent increase is 21.43%.