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

Subtract 21/49 from 10/54

10/54 - 21/49 is -46/189.

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

Next, find the equivalent fraction of both fractional numbers with denominator 2646
For the 1st fraction, since 54 × 49 = 2646,
10/54 = 10 × 49/54 × 49 = 490/2646
Likewise, for the 2nd fraction, since 49 × 54 = 2646,
21/49 = 21 × 54/49 × 54 = 1134/2646
Subtract the two like fractions:
490/2646 - 1134/2646 = 490 - 1134/2646 = -644/2646
After reducing the fraction, the answer is -46/189

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