The price of a commodity increases by 10%, then decreases by 20%. The current price is () A. 80%B. 86%C. 88%D. 90%

The price of a commodity increases by 10%, then decreases by 20%. The current price is () A. 80%B. 86%C. 88%D. 90%

Suppose that the original price of the commodity is 100 yuan, then: 100 × (1 + 10%) × (1-20%) = 100 × 1.1 × 0.8 = 88 (yuan) 88 △ 100 = 88%, so choose: C

The price of a commodity is reduced by 10% and then increased by 20%. Compared with the original price, ()
① The current price is higher than the original price; the current price is lower than the original price; the current price is equal to the original price

Original price = a
After price reduction = a (1-10%) = 0.9A
After price increase = 0.9A (1 + 20%) = 0.9A * 1.2 = 1.08a
08A > a so
① The current price is higher than the original price

For a product with a price of 20 yuan, first increase the price by 10%, and then decrease the price by 10%. In this way, will the final price be higher or lower than the original price? How much is the difference from the original price

Current price = 20 × (1 + 10%) × (1-10%) = 19.8 yuan
Difference = 20-19.8 = 0.2 yuan