Calculate percentage of X, quick & simple.
Let's take a quick example here:
You have a Target coupon of $1000 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 = (1000 x 18) / 100
Amount Saved = 18000 / 100
Amount Saved = $180 (answer).
In other words, a 18% discount for a purchase with an original price of $1000 equals $180 (Amount Saved), so you'll end up paying 820.