Subtract 21/54 from 10/49, Solve 10/49

Subtract 21/54 from 10/49

10/49 - 21/54 is -163/882.

Find the least common denominator or LCM of the two denominators:
LCM of 49 and 54 is 2646

Next, find the equivalent fraction of both fractional numbers with denominator 2646
For the 1st fraction, since 49 × 54 = 2646,
10/49 = 10 × 54/49 × 54 = 540/2646
Likewise, for the 2nd fraction, since 54 × 49 = 2646,
21/54 = 21 × 49/54 × 49 = 1029/2646
Subtract the two like fractions:
540/2646 - 1029/2646 = 540 - 1029/2646 = -489/2646
After reducing the fraction, the answer is -163/882

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