8分之7= 4:0.75=

问题描述:

8分之7= 4:0.75=

2/5:7/8
=2/5x8/7
=16:35
4:0.75
=4:3/4
=16:34:0.75同时乘或除以多少?0.75 变3/4 呀然后乘4