甲是25,比乙多5,乙是甲的几分之几?乙比甲少几分之几?甲比乙多几分之几?

题目

甲是25,比乙多5,乙是甲的几分之几?乙比甲少几分之几?甲比乙多几分之几?

答案

甲是25,比乙多5,乙是甲的几分之几=(25-5)/25=4/5;乙比甲少几分之几=5/25=1/5;甲比乙多几分之几=5/(25-5)=5/20=1/4;