Calculate percentage of X, quick & simple.
Let's take a quick example here:
You have a Target coupon of $13 and you need to know how much will you save on your purchase if the discount is 18 percent.
Solution:
Amount Saved = Original Price x Discount in Percent / 100
Amount Saved = (13 x 18) / 100
Amount Saved = 234 / 100
Amount Saved = $2.34 (answer).
In other words, a 18% discount for a purchase with an original price of $13 equals $2.34 (Amount Saved), so you'll end up paying 10.66.