Subtract 8/9 from 80/42, Solve 1 38/42

Subtract 8/9 from 80/42

1^st number: 1 38/42, 2^nd number: 8/9

80/42 - 8/9 is 64/63.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 9 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 42 × 3 = 126,
80/42 = 80 × 3/42 × 3 = 240/126
Likewise, for the 2nd fraction, since 9 × 14 = 126,
8/9 = 8 × 14/9 × 14 = 112/126
Subtract the two like fractions:
240/126 - 112/126 = 240 - 112/126 = 128/126
After reducing the fraction, the answer is 64/63
In mixed form: 11/63

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