50立方米比_立方米多25%,30千克比80千克少_%.

问题描述:

50立方米比______立方米多25%,30千克比80千克少______%.

(1)50÷(1+25%),
=40(立方米);
(2)(80-30)÷80=62.5%;
故答案为:40,62.5.