# Cvs was having a sale, the tissues were 20% of How much money does Nurse smith save on 13 boxes of tissues? How much does she save per box?

Jul 27, 2017

See a solution process below:

#### Explanation:

Let's say the regular price for a single box of tissues was $x Then, the savings on a single box of tissues is: s = 20% " of "$x

Where:

$s$ is the savings from the sale on a single box of tissues.

20% is the sale percentage. "Percent" or "%" means "out of 100" or "per 100", Therefore 20% can be written as $\frac{20}{100}$.

When dealing with percents the word "of" means "times" or "to multiply".

$x is the regular price for a single box of tissues. Rewriting the equation gives: s = 20/100 xx$x

s = (20 xx 1)/(20 xx 5) xx $x s = (color(red)(cancel(color(black)(20))) xx 1)/(color(red)(cancel(color(black)(20))) xx 5) xx$x

s = 1/5 xx $x s = ($x)/5

The savings on 13 boxes of tissue would be:

13 xx s = 13 xx ($x)/5 13s = ($13x)/5

If you are given a regular price for a box of tissues, substitute this prices for $x and calculate the savings for one box of tissues and $13\$ boxes of tissues.