Calculate percentage of X, quick & simple.
Let's take a quick example here:
You have a Target coupon of $640 and you need to know how much will you save on your purchase if the discount is 73 percent.
Solution:
Amount Saved = Original Price x Discount in Percent / 100
Amount Saved = (640 x 73) / 100
Amount Saved = 46720 / 100
Amount Saved = $467.2 (answer).
In other words, a 73% discount for a purchase with an original price of $640 equals $467.2 (Amount Saved), so you'll end up paying 172.8.