Calculate percentage of X, quick & simple.
Let's take a quick example here:
You have a Target coupon of $313 and you need to know how much will you save on your purchase if the discount is 40 percent.
Solution:
Amount Saved = Original Price x Discount in Percent / 100
Amount Saved = (313 x 40) / 100
Amount Saved = 12520 / 100
Amount Saved = $125.2 (answer).
In other words, a 40% discount for a purchase with an original price of $313 equals $125.2 (Amount Saved), so you'll end up paying 187.8.