Subtract 10/54 from 7/49, Solve 7/49

Subtract 10/54 from 7/49

7/49 - 10/54 is -8/189.

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,
7/49 = 7 × 54/49 × 54 = 378/2646
Likewise, for the 2nd fraction, since 54 × 49 = 2646,
10/54 = 10 × 49/54 × 49 = 490/2646
Subtract the two like fractions:
378/2646 - 490/2646 = 378 - 490/2646 = -112/2646
After reducing the fraction, the answer is -8/189

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