Subtract 72/63 from 35/42, Solve 35/42

Subtract 72/63 from 35/42

1^st number: 35/42, 2^nd number: 1 9/63

35/42 - 72/63 is -13/42.

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,
35/42 = 35 × 3/42 × 3 = 105/126
Likewise, for the 2nd fraction, since 63 × 2 = 126,
72/63 = 72 × 2/63 × 2 = 144/126
Subtract the two like fractions:
105/126 - 144/126 = 105 - 144/126 = -39/126
After reducing the fraction, the answer is -13/42

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