Calculate percentage of X, quick & simple.
Let's take a quick example here:
You have a Target coupon of $100 and you need to know how much will you save on your purchase if the discount is 4 percent.
Solution:
Amount Saved = Original Price x Discount in Percent / 100
Amount Saved = (100 x 4) / 100
Amount Saved = 400 / 100
Amount Saved = $4 (answer).
In other words, a 4% discount for a purchase with an original price of $100 equals $4 (Amount Saved), so you'll end up paying 96.