求比值16:20 2:1/4 4.5:6

问题描述:

求比值16:20 2:1/4 4.5:6

4:5 1:1/8 3:4

16:20=40.8
2:1/4 =8
4.5:6=0.75

16:20=4:5=0.8
2:1/4=2×4=8
4.5:6=3:4=0.75