Subtract 75/63 from 60/42, Solve 1 18/42

Subtract 75/63 from 60/42

1^st number: 1 18/42, 2^nd number: 1 12/63

60/42 - 75/63 is 5/21.

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,
60/42 = 60 × 3/42 × 3 = 180/126
Likewise, for the 2nd fraction, since 63 × 2 = 126,
75/63 = 75 × 2/63 × 2 = 150/126
Subtract the two like fractions:
180/126 - 150/126 = 180 - 150/126 = 30/126
After reducing the fraction, the answer is 5/21

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