Subtract 10/63 from 80/42, Solve 1 38/42

Subtract 10/63 from 80/42

1^st number: 1 38/42, 2^nd number: 10/63

80/42 - 10/63 is 110/63.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 63 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 63 × 2 = 126,
10/63 = 10 × 2/63 × 2 = 20/126
Subtract the two like fractions:
240/126 - 20/126 = 240 - 20/126 = 220/126
After reducing the fraction, the answer is 110/63
In mixed form: 147/63

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