Subtract 9/54 from 21/98, Solve 21/98

Subtract 9/54 from 21/98

21/98 - 9/54 is 1/21.

Find the least common denominator or LCM of the two denominators:
LCM of 98 and 54 is 2646

Next, find the equivalent fraction of both fractional numbers with denominator 2646
For the 1st fraction, since 98 × 27 = 2646,
21/98 = 21 × 27/98 × 27 = 567/2646
Likewise, for the 2nd fraction, since 54 × 49 = 2646,
9/54 = 9 × 49/54 × 49 = 441/2646
Subtract the two like fractions:
567/2646 - 441/2646 = 567 - 441/2646 = 126/2646
After reducing the fraction, the answer is 1/21

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