# Question #cd5b3

Jul 31, 2017

See a solution process below:

#### Explanation:

The formula for calculating the percent change in a value between two points in time is:

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

Where:

$p$ is the percent change - what we are solving for in this problem.

$N$ is the New Value - $36.00 per share in this problem. $O$is the Old Value -$90.00 per share in this problem.

Substituting and solving for $p$ gives:

$p = \frac{36 - 90}{90} \cdot 100$

$p = - \frac{54}{90} \cdot 100$

$p = - \frac{5400}{90}$

$p = - 60$

The stock changed by -60% or decreased by 60%.