1/5吨比1/4吨少_%,1/4吨比1/5吨多_%.

问题描述:

1
5
吨比
1
4
吨少______%,
1
4
吨比
1
5
吨多______%.

(1)(

1
4
-
1
5
÷
1
4

=
1
20
÷
1
4

=20%;
(2)(
1
4
-
1
5
÷
1
5

=
1
20
÷
1
5

=25%;
故答案为:20,25.