Subtract 42/12 from 1/63, Solve 1/63

Subtract 42/12 from 1/63

1^st number: 1/63, 2^nd number: 3 6/12

1/63 - 42/12 is -439/126.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 12 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 63 × 4 = 252,
1/63 = 1 × 4/63 × 4 = 4/252
Likewise, for the 2nd fraction, since 12 × 21 = 252,
42/12 = 42 × 21/12 × 21 = 882/252
Subtract the two like fractions:
4/252 - 882/252 = 4 - 882/252 = -878/252
After reducing the fraction, the answer is -439/126

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