The price of a commodity is increased by one tenth and then decreased by one tenth. At this time, the price of the commodity is 99 yuan. How much is the original price of the commodity?

100 yuan First raise one tenth to 110, then reduce one tenth to 99

Is the price of a commodity reduced by one tenth of a yuan, and then increased by one tenth of a yuan, lower or higher than the original price?

For example, if the original price of 10 yuan is reduced by 1 / 10, that is 10-10 * 1 / 10 = 9 yuan
9 yuan, 1 / 10 increase is 9 + 9 * 1 / 10 = 9.9 yuan

If the price of a commodity increases by one tenth first and then decreases by one eleventh, the current price will be lower than the original price

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