1/2=10/20, 3/4=15/20, 4/5=16/20, 7/10=14/20, 44/80=11/20, 9/15=3/5=12/20
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1/2=10/20, 3/4=15/20, 4/5=16/20, 7/10=14/20, 44/80=11/20, 9/15=3/5=12/20