If the purchase price of a commodity is 250 yuan and the profit margin is 15.2% when it is sold at a 10% discount on the marked price, then the marked price of each commodity is 100 yuan______ ．

If the purchase price of a commodity is 250 yuan and the profit margin is 15.2% when it is sold at a 10% discount on the marked price, then the marked price of each commodity is 100 yuan______ ．

Suppose the price of each item is x yuan, X × 90% = 250 × (1 + 15.2%), and the solution is x = 320

In the past, the profit margin of a certain commodity sold by a supermarket was 20%. Now, because the purchase price has been reduced by 20% and the selling price has not changed, what is the profit margin of the commodity
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The sales profit margin is 33.3%
Original purchase price: X, selling price: (1 + 0.2) x
The current purchase price is: (1-0.2) x, and the profit margin is: (1 + 0.2) x - (1-0.2) x / (1 + 0.2) x = 33.3%