# How do you find the percent change given before:75 and after:60?

Dec 2, 2016

This was a -20% change.

#### Explanation:

The formula for calculating the percent change is:

$p = \frac{N - O}{O} \cdot 100$ where $p$ is the percent change, $N$ is the New Value and $O$ is the Old Value.

We can substitute the values provided in the problem and solve for $p$:

$p = \frac{60 - 75}{75} \cdot 100$

$p = - \frac{15}{75} \cdot 100$

$p = - \frac{1500}{75}$

$p = - 20$