如何计算利润成本5元的东西卖20元,利润为百分之几 解答: (20-5)÷5 =15÷5 =3 =300% 利润为300%
30元的东西卖100元利润是百分之几怎么算解:根据题意列式为:(100-30)÷30x100%=70÷30x100%≈2.33x100%=233%