Subtract 9/12 from 70/63, Solve 1 7/63

Subtract 9/12 from 70/63

1^st number: 1 7/63, 2^nd number: 9/12

70/63 - 9/12 is 13/36.

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,
70/63 = 70 × 4/63 × 4 = 280/252
Likewise, for the 2nd fraction, since 12 × 21 = 252,
9/12 = 9 × 21/12 × 21 = 189/252
Subtract the two like fractions:
280/252 - 189/252 = 280 - 189/252 = 91/252
After reducing the fraction, the answer is 13/36

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