3/4:7/2 求比值,1/2:2/3 5/7:25/49

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3/4:7/2 求比值,1/2:2/3 5/7:25/49
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3/4:7/2 求比值,1/2:2/3 5/7:25/49
3/4:7/2 求比值,
1/2:2/3 5/7:25/49

3/4:7/2 求比值,1/2:2/3 5/7:25/49
3/4:7/2=3/4:14/4=3:14
1/2:2/3=3/6:4/6=3:4
5/7:25/49=35/49:25/49=35:25=7:5

1/2:2/3 5/7:25/49
=1/2*3/2 =5/7*49/25
=3/4 =7/5