Calculate percentage of X, quick & simple.
Let's take a quick example here:
You have a Target coupon of $638 and you need to know how much will you save on your purchase if the discount is 91 percent.
Solution:
Amount Saved = Original Price x Discount in Percent / 100
Amount Saved = (638 x 91) / 100
Amount Saved = 58058 / 100
Amount Saved = $580.58 (answer).
In other words, a 91% discount for a purchase with an original price of $638 equals $580.58 (Amount Saved), so you'll end up paying 57.42.