Calculate percentage of X, quick & simple.
Let's take a quick example here:
You have a Target coupon of $90 and you need to know how much will you save on your purchase if the discount is 9 percent.
Solution:
Amount Saved = Original Price x Discount in Percent / 100
Amount Saved = (90 x 9) / 100
Amount Saved = 810 / 100
Amount Saved = $8.1 (answer).
In other words, a 9% discount for a purchase with an original price of $90 equals $8.1 (Amount Saved), so you'll end up paying 81.9.