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A)28/35=4/5
B)30/21=10/7=1 3/7
C)44/80=11/20
2.
A) 3X5 1/3+6 2/3:4/5=3X16/3+20/3:4/5=48/3+20/3X5/4=48/3+25/3=73/3=24 1/3
B)2 13/18:5 1/4X1 2/7=49/18:21/4X9/7=49/18X4/21X9/7=1764/2646=36/54= 6/9=2/3
C)2 4/5-1 1/5X2/3+5 1/15=14/5-6/5X2/3+76/15=14/5-12/15+76/15=42/15-12/15+76/15=106/15=7 1/15