Thinking questions on page 8 of supplementary exercises of mathematics in Volume 2 of Primary School of Jiangsu Education Press

Title: a down jacket, according to the purchase price increased by 25% price. Later because of the warmer weather, according to the price of 75% discount. Ask is loss is profit?
Answer: 1 minus 75% = 25%
25%=25%
A: it's a compensation, because the unit "1" is different

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