Calculate percentage of X, quick & simple.
Let's take a quick example here:
You have a Target coupon of $639 and you need to know how much will you save on your purchase if the discount is 22 percent.
Solution:
Amount Saved = Original Price x Discount in Percent / 100
Amount Saved = (639 x 22) / 100
Amount Saved = 14058 / 100
Amount Saved = $140.58 (answer).
In other words, a 22% discount for a purchase with an original price of $639 equals $140.58 (Amount Saved), so you'll end up paying 498.42.