20吨比60吨少()%,40比30多()%
问题描述:
20吨比60吨少()%,40比30多()%
答
20吨比60吨少(66.67)%,40比30多(33.33)%
(60-20)÷60x100%
=2/3x100%
=66.67%
(40-30)÷30x100%
=1/3x100%
=33.33%