35:63 45:120 1.4:0.85
问题描述：
35:63 45:120 1.4:0.85
答
35:63=5*7:7*9=5:9
45:120=5*3*3:5*3*8=3:8
1.4:0.85=1.4*100:0.85:100=140:85=5*28:5*17=28:17