Calculate percentage of X, quick & simple.
Let's take a quick example here:
You have a Target coupon of $670 and you need to know how much will you save on your purchase if the discount is 87 percent.
Solution:
Amount Saved = Original Price x Discount in Percent / 100
Amount Saved = (670 x 87) / 100
Amount Saved = 58290 / 100
Amount Saved = $582.9 (answer).
In other words, a 87% discount for a purchase with an original price of $670 equals $582.9 (Amount Saved), so you'll end up paying 87.1.