Subtract 81/54 from 4/98, Solve 4/98

Subtract 81/54 from 4/98

1^st number: 4/98, 2^nd number: 1 27/54

4/98 - 81/54 is -143/98.

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,
4/98 = 4 × 27/98 × 27 = 108/2646
Likewise, for the 2nd fraction, since 54 × 49 = 2646,
81/54 = 81 × 49/54 × 49 = 3969/2646
Subtract the two like fractions:
108/2646 - 3969/2646 = 108 - 3969/2646 = -3861/2646
After reducing the fraction, the answer is -143/98

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