Calculate percentage of X, quick & simple.
Let's take a quick example here:
You have a Target coupon of $10000 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 = (10000 x 87) / 100
Amount Saved = 870000 / 100
Amount Saved = $8700 (answer).
In other words, a 87% discount for a purchase with an original price of $10000 equals $8700 (Amount Saved), so you'll end up paying 1300.