Subtract 10/18 from 72/42, Solve 1 30/42

Subtract 10/18 from 72/42

1^st number: 1 30/42, 2^nd number: 10/18

72/42 - 10/18 is 73/63.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 18 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 42 × 3 = 126,
72/42 = 72 × 3/42 × 3 = 216/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
10/18 = 10 × 7/18 × 7 = 70/126
Subtract the two like fractions:
216/126 - 70/126 = 216 - 70/126 = 146/126
After reducing the fraction, the answer is 73/63
In mixed form: 110/63

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