Subtract 6/54 from 21/49, Solve 21/49

Subtract 6/54 from 21/49

21/49 - 6/54 is 20/63.

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,
21/49 = 21 × 54/49 × 54 = 1134/2646
Likewise, for the 2nd fraction, since 54 × 49 = 2646,
6/54 = 6 × 49/54 × 49 = 294/2646
Subtract the two like fractions:
1134/2646 - 294/2646 = 1134 - 294/2646 = 840/2646
After reducing the fraction, the answer is 20/63

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