Calculate percentage of X, quick & simple.
Let's take a quick example here:
You have a Target coupon of $173 and you need to know how much will you save on your purchase if the discount is 90 percent.
Solution:
Amount Saved = Original Price x Discount in Percent / 100
Amount Saved = (173 x 90) / 100
Amount Saved = 15570 / 100
Amount Saved = $155.7 (answer).
In other words, a 90% discount for a purchase with an original price of $173 equals $155.7 (Amount Saved), so you'll end up paying 17.3.