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On-line solution of math problems in the sixth grade of primary school (online, etc. )
The purchase price of the skirt that earned 20% is150 ÷ (1+20%) =125 yuan, and the purchase price of the skirt that lost 20% is150 ÷ (1-20%). The total purchase price was125+187.5 = 3 12.5 yuan, so this clothing store lost money, losing12.5 yuan.
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