A commodity is priced at 38% of the profit. After 40% is sold, the price is reduced. When all the commodities are sold out, the total profit is 29.72%（ What percentage of the reduction

Reduce the price by 10%
=（138%-1-29.72%）/（138%*60%）=8.28%/82.8%=10%
(Note: the profit is plus profit. If the title is clear and the profit rate is calculated by deduction, the situation is much more complicated.)

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