Subtract 80/12 from 9/63, Solve 9/63

Subtract 80/12 from 9/63

1^st number: 9/63, 2^nd number: 6 8/12

9/63 - 80/12 is -137/21.

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,
9/63 = 9 × 4/63 × 4 = 36/252
Likewise, for the 2nd fraction, since 12 × 21 = 252,
80/12 = 80 × 21/12 × 21 = 1680/252
Subtract the two like fractions:
36/252 - 1680/252 = 36 - 1680/252 = -1644/252
After reducing the fraction, the answer is -137/21

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