Calculate percentage of X, quick & simple.
Let's take a quick example here:
You have a Target coupon of $3170 and you need to know how much will you save on your purchase if the discount is 80 percent.
Solution:
Amount Saved = Original Price x Discount in Percent / 100
Amount Saved = (3170 x 80) / 100
Amount Saved = 253600 / 100
Amount Saved = $2536 (answer).
In other words, a 80% discount for a purchase with an original price of $3170 equals $2536 (Amount Saved), so you'll end up paying 634.