100% - 20% = 80%
$26.95 * 80% = $21.56
You multiply by 80% because you are taking 20% off and now want to know what 80% of the price will be.
<span>the difference between the largest and smallest data values in a data set.</span>
The 4 on the left side is 10x more than the 4 on the right. This only works if the numbers are next to each other and are the same.
