Calculate percentage of X, quick & simple.
Let's take a quick example here:
You have a Target coupon of $618 and you need to know how much will you save on your purchase if the discount is 81 percent.
Solution:
Amount Saved = Original Price x Discount in Percent / 100
Amount Saved = (618 x 81) / 100
Amount Saved = 50058 / 100
Amount Saved = $500.58 (answer).
In other words, a 81% discount for a purchase with an original price of $618 equals $500.58 (Amount Saved), so you'll end up paying 117.42.