Answer:
15.
a)
i)43/9= 4 7/9
ii)17/4= 4 1/4
b)
i)3 9/11= 42/11 - 11 times 3=33, 33+9=42
ii)5 6/12= 66/12 - 12 times 6=60, 60+6=66
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