1 4/5+3/7=9/5+3/7=63/35+15/35=78/35
19 1/2:78/35=39/2*35/78=35/4=8 3/4
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1 4/5+3/7=9/5+3/7=63/35+15/35=78/35
19 1/2:78/35=39/2*35/78=35/4=8 3/4