Calculate percentage of X, quick & simple.
Let's take a quick example here:
You have a Target coupon of $539 and you need to know how much will you save on your purchase if the discount is 20 percent.
Solution:
Amount Saved = Original Price x Discount in Percent / 100
Amount Saved = (539 x 20) / 100
Amount Saved = 10780 / 100
Amount Saved = $107.8 (answer).
In other words, a 20% discount for a purchase with an original price of $539 equals $107.8 (Amount Saved), so you'll end up paying 431.2.