Calculation method: directly divide the discount price by the discount rate to get the original price. According to the formula, discount price = original price * discount rate, so original price = discount price ÷ discount rate.

For example, original price 1 10, discounted price1/kloc-0 * 0.8 = 88, original price 88/0.8= 1 10. Original price 100 yuan, 10% discount. The discounted price is 100×0.98=98 yuan, and the discounted price is 100× 0.8 = 80 yuan.

Mathematical discount formula

1. discount = actual selling price ÷ original selling price × 100%. Discount refers to a certain percentage discount on the basis of the original price when buying and selling goods, such as 10% discount, which is called 10% discount or 10% discount.

2. If the discount rate is indicated in the price terms, it is called "Mingkou"; On the contrary, it is "hidden buckle". Discount is directly related to the price of goods. Whether discounts and discount rates are included in commodity prices affects commodity prices. The higher the discount rate, the lower the price.

3. Discount is an inevitable product of market economy. Proper use of discount is conducive to mobilizing the enthusiasm of buyers and expanding sales. In international trade, it is a means to strengthen foreign competition.