能简算的要简算(25%+3/5)÷(1-66%)

问题描述:

能简算的要简算(25%+3/5)÷(1-66%)

(25%+3/5)÷(1-66%)
=(1/4 + 3/5) ÷(1- 33/50)
=(5/20 + 12/20)÷(17/50)
=17/20 ×(50/17)
=5/2
(=2又1/2)