# The annual number of deaths from cardiovascular disease in the United States decreased from 1,008,000 in 1970 to 910,600 in 2004, what is the percent change?

Jun 6, 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 - 910600 in this problem.

$O$ is the Old Value - 1008000 in this problem.

Substituting and solving for $p$ gives:

$p = \frac{910600 - 1008000}{1008000} \cdot 100$

$p = - \frac{97400}{1008000} \cdot 100$

$p = - \frac{9740000}{1008000}$

$p = - 9.7$ rounded to the nearest tenth.

There was a change of -9.7% or a decrease in deaths of $9.75$