# The circulation of a newsletter decreased from 5200 to 3140. How do you find the percent of decrease in circulation to the nearest percent?

##### 1 Answer
Jan 7, 2017

See explanation below:

#### Explanation:

The formula for calculating the change in rate over time is:

$p = \frac{N - O}{O} \cdot 100$

Where:

$p$ is the percent increase or decrease over time.

$N$ is the New Value

$O$ is the Old Value

Substituting what we have been given:

$p = \frac{3140 - 5200}{5200} \cdot 100$

$p = - \frac{2060}{5200} \cdot 100$

$p = - 0.396 \times 100$

$p = - 39.6$

The percent change was -40% or a 40% decrease in circulation.