Calculate percentage of X, quick & simple.
Let's take a quick example here:
You have a Target coupon of $70 and you need to know how much will you save on your purchase if the discount is 100 percent.
Solution:
Amount Saved = Original Price x Discount in Percent / 100
Amount Saved = (70 x 100) / 100
Amount Saved = 7000 / 100
Amount Saved = $70 (answer).
In other words, a 100% discount for a purchase with an original price of $70 equals $70 (Amount Saved), so you'll end up paying 0.