How do you calculate the percent change of 24 to 21?

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Answer 1 · 2017-02-27T03:05:28

See the entire solution process below:

The formula for change in percent is:

$p = \frac{N - O}{O} \cdot 100$ $p = (N - O)/O * 100$

Where:
$p$ $p$ is the percentage change.
$N$ $N$ is the New Value - 21 for this problem
$O$ $O$ is the Old Value - 24 for this problem

Substituting and calculating gives:

$p = \frac{21 - 24}{24} \cdot 100$ $p = (21 - 24)/24 * 100$

$p = - \frac{3}{24} \cdot 100$ $p = -3/24 * 100$

$p = - \frac{300}{24}$ $p = -300/24$

$p = 12.5$ $p = 12.5$

The change was 12.5%