Subtract 56/49 from 20/63, Solve 20/63

Subtract 56/49 from 20/63

1^st number: 20/63, 2^nd number: 1 7/49

20/63 - 56/49 is -52/63.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 49 is 441

Next, find the equivalent fraction of both fractional numbers with denominator 441
For the 1st fraction, since 63 × 7 = 441,
20/63 = 20 × 7/63 × 7 = 140/441
Likewise, for the 2nd fraction, since 49 × 9 = 441,
56/49 = 56 × 9/49 × 9 = 504/441
Subtract the two like fractions:
140/441 - 504/441 = 140 - 504/441 = -364/441
After reducing the fraction, the answer is -52/63

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