Which is the bigger discount, 10% discount or 20% discount?

20% discount Discount is to sell according to a certain proportion of the "selling price", that is, the original price multiplied by the corresponding discount coefficient. 10% discount and 20% discount, that is to say, the original price of the goods multiplied by 90% and 20% respectively is the discount price; Suppose the original price is 100 yuan, and 90% of the original price is equal to 100 times 90% is equal to 90 yuan; 20% of the original price equals 100 times 20% equals 20 yuan; The price in 20 yuan is obviously better than that in 90 yuan. So the 20% discount is very big.