Calculate percentage of X, quick & simple.
Let's take a quick example here:
You have a Target coupon of $128 and you need to know how much will you save on your purchase if the discount is 51 percent.
Solution:
Amount Saved = Original Price x Discount in Percent / 100
Amount Saved = (128 x 51) / 100
Amount Saved = 6528 / 100
Amount Saved = $65.28 (answer).
In other words, a 51% discount for a purchase with an original price of $128 equals $65.28 (Amount Saved), so you'll end up paying 62.72.