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?

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Answer 1 · 2017-06-06T14:23:55

See a solution process below:

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

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

Where:

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

$N$ $N$ is the New Value - 910600 in this problem.

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

Substituting and solving for $p$ $p$ gives:

$p = \frac{910600 - 1008000}{1008000} \cdot 100$ $p = (910600 - 1008000)/1008000 *100$

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

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

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

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