50是80的百分之几？ 50比80少百分之几？

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50/稿渗80=62.5%
(80-50)/裤敬瞎胡空80=37.5%

所以,50是80的62.5%; 50比80少37.5%

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50/80=62.5%
80-50=30
30÷80=0.375=37.5%

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