Question

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?

Answer 1

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 `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.