Calculate percentage of X, quick & simple.
Let's take a quick example here:
You have a Target coupon of $4202 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 = (4202 x 100) / 100
Amount Saved = 420200 / 100
Amount Saved = $4202 (answer).
In other words, a 100% discount for a purchase with an original price of $4202 equals $4202 (Amount Saved), so you'll end up paying 0.