A 10% discount on a product means that the original price is one tenth cheaper than the current price. Why?

For example, 100% of the original price of a product sold at 160 yuan is the original price, that is, there is no discount. If you give a 10% discount, it is 90% of the original price. 160% is 90% = 144

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1. After a discount, the ratio of the current price to the original price is 3:5. How much discount is the current price? How much cheaper is it than the original price
2. 15% off a commodity can be sold 90 yuan cheaper, how much is the original price of the commodity?
3. A commodity is sold at a 15% discount, which is 15% cheaper than the original price______ ．
4. A set of children's clothes will be sold at 255 yuan after 15% discount. How much is the original price of this set of clothes? How much is the current price cheaper than the original price? Math, not clothes!
5. The price of a coat is 170 yuan at a 25% discount. How much is the original price of the coat? How much is the current price cheaper than the original price?
6. The price of a suit of clothes is 340 yuan at 15% discount. How much is the original price of the suit? How much is the present price cheaper than the original price?
7. The price of a piece of clothing is 200 yuan, and the price is 150 yuan after the discount. It's a discount______ They are sold at a discount
8. The present price of a dress is 200 yuan, 20% cheaper than the original price. How much is the original price?
9. The original price of a dress is 200 yuan. Now it's 50 yuan cheaper than the original price
10. A suit of clothes is sold at 20% discount, which is 200 yuan cheaper than before. How much is the original price of this suit?
11. A 20% discount on a product means that the current price is ()% of the original price and ()% cheaper than the original price
12. The goods are sold at a 10% discount, indicating that the current price is ()% lower than the original price
13. A commodity price is raised by 20% and then reduced by 20%. The current price is compared with the original price A. The current price is the same as the original price B. the current price is lower than the original price C. The current price is higher than the original price D. It's not easy to compare
14. The original price of a commodity is 52 yuan, and the current price is 39 yuan. The price has been reduced______ %．
15. 2. The original price of a commodity is 52 yuan, and the current price is 39 yuan. How much is the price reduction? 3. The electricity consumption of the school this month is 900 degrees, which is 10% less than that of last month 4. When a typist types a manuscript, the ratio of the number of pages typed on the first day to the total number is 1:10. If he type six more pages, he can finish 15% of the manuscript. How many pages does the manuscript have For the formula, just answer the fourth question
16. For a commodity, the original price is 1000 yuan, but now the price is reduced by 200 yuan. How much has the price been reduced
17. A kind of TV set, the original price is 2200 yuan, the current price is 200 yuan, how much is the price reduction
18. The current price of a coat is 200 yuan, which is 50 yuan lower than the original price. How much lower?
19. The original price of a commodity is 200 yuan. After the price is reduced by 5%, the price is increased by 5%, and the current price is increased by 5%___ Yuan
20. Who knows the area formula of a circle, the arc length formula of a circle, and the sector area formula