Calculate percentage of X, quick & simple.
Let's take a quick example here:
You have a Target coupon of $4009 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 = (4009 x 21) / 100
Amount Saved = 84189 / 100
Amount Saved = $841.89 (answer).
In other words, a 21% discount for a purchase with an original price of $4009 equals $841.89 (Amount Saved), so you'll end up paying 3167.11.