Calculate percentage of X, quick & simple.
Let's take a quick example here:
You have a Target coupon of $646 and you need to know how much will you save on your purchase if the discount is 78 percent.
Solution:
Amount Saved = Original Price x Discount in Percent / 100
Amount Saved = (646 x 78) / 100
Amount Saved = 50388 / 100
Amount Saved = $503.88 (answer).
In other words, a 78% discount for a purchase with an original price of $646 equals $503.88 (Amount Saved), so you'll end up paying 142.12.