甲数是4,乙数是5,\x0d甲数是乙数的百分之几?4/5 = 80%\x0d乙数是甲数的百分之几?5/4 = 125%\x0d甲数比乙数少百分之几?(5-4)/5 = 1/5 = 20%\x0d乙数比甲数多百分之几?(5- 4)/4 = 1/4 = 25%