甲数是4,乙数是5,甲数是乙数的百分之几?乙数是甲数的百分之几?甲数比乙数少百分之几?乙数比甲数多百分之几?
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甲数是4,乙数是5,

甲数是乙数的百分之几?4/5 = 80%

乙数是甲数的百分之几?5/4 = 125%

甲数比乙数少百分之几?(5-4)/5 = 1/5 = 20%

乙数比甲数多百分之几?(5- 4)/4 = 1/4 = 25%