Calculate percentage of X, quick & simple.
Let's take a quick example here:
You have a Target coupon of $138 and you need to know how much will you save on your purchase if the discount is 50 percent.
Solution:
Amount Saved = Original Price x Discount in Percent / 100
Amount Saved = (138 x 50) / 100
Amount Saved = 6900 / 100
Amount Saved = $69 (answer).
In other words, a 50% discount for a purchase with an original price of $138 equals $69 (Amount Saved), so you'll end up paying 69.