Question

甲数比乙数多它的m/n,那么乙数比甲数少几分之几?甲数比数少它的m/n,那么,乙数比甲数多几分之几?

Answer 1

①设乙数为1

m/n/(1+m/n)

=m/( n+m)

②　同样设乙数为1

m/n/(1-m/n)

=m/(n-m)