Subtract 49/20 from 12/63, Solve 12/63

Subtract 49/20 from 12/63

1^st number: 12/63, 2^nd number: 2 9/20

12/63 - 49/20 is -949/420.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 20 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 63 × 20 = 1260,
12/63 = 12 × 20/63 × 20 = 240/1260
Likewise, for the 2nd fraction, since 20 × 63 = 1260,
49/20 = 49 × 63/20 × 63 = 3087/1260
Subtract the two like fractions:
240/1260 - 3087/1260 = 240 - 3087/1260 = -2847/1260
After reducing the fraction, the answer is -949/420

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