Subtract 70/63 from 3/12, Solve 3/12

Subtract 70/63 from 3/12

1^st number: 3/12, 2^nd number: 1 7/63

3/12 - 70/63 is -31/36.

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

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 12 × 21 = 252,
3/12 = 3 × 21/12 × 21 = 63/252
Likewise, for the 2nd fraction, since 63 × 4 = 252,
70/63 = 70 × 4/63 × 4 = 280/252
Subtract the two like fractions:
63/252 - 280/252 = 63 - 280/252 = -217/252
After reducing the fraction, the answer is -31/36

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