Calculate percentage of X, quick & simple.
Let's take a quick example here:
You have a Target coupon of $4005 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 = (4005 x 20) / 100
Amount Saved = 80100 / 100
Amount Saved = $801 (answer).
In other words, a 20% discount for a purchase with an original price of $4005 equals $801 (Amount Saved), so you'll end up paying 3204.