Calculate percentage of X, quick & simple.
Let's take a quick example here:
You have a Target coupon of $489 and you need to know how much will you save on your purchase if the discount is 90 percent.
Solution:
Amount Saved = Original Price x Discount in Percent / 100
Amount Saved = (489 x 90) / 100
Amount Saved = 44010 / 100
Amount Saved = $440.1 (answer).
In other words, a 90% discount for a purchase with an original price of $489 equals $440.1 (Amount Saved), so you'll end up paying 48.9.