求比值:2/7:5/281.5:1/3

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求比值:2/7:5/281.5:1/3

求比值:2/7:5/281.5:1/3
求比值:2/7:5/28
1.5:1/3

求比值:2/7:5/281.5:1/3
2/7:5/28
=2/7÷ 5/28
=2/7x28/5
=8/5
1.5:1/3
=1.5x3
=4.5