Calculate percentage of X, quick & simple.
Let's take a quick example here:
You have a Target coupon of $8580 and you need to know how much will you save on your purchase if the discount is 21 percent.
Solution:
Amount Saved = Original Price x Discount in Percent / 100
Amount Saved = (8580 x 21) / 100
Amount Saved = 180180 / 100
Amount Saved = $1801.8 (answer).
In other words, a 21% discount for a purchase with an original price of $8580 equals $1801.8 (Amount Saved), so you'll end up paying 6778.2.