Discount Calculator — Find the Sale PriceDiscounted price = Original price - (Original price x Discount (%) / 100). Where Original price x Discount (%) / 100 equals the dollar amount savings. A percentage discount can be converted to a discount rate by dividing it by one hundred, e.g. 10% discount means the discount rate is 10 / 100 = 0.1. This straightforward formula is behind the Subscription ..