Subtract 81/21 from 4/98, Solve 4/98

Subtract 81/21 from 4/98

1^st number: 4/98, 2^nd number: 3 18/21

4/98 - 81/21 is -187/49.

Find the least common denominator or LCM of the two denominators:
LCM of 98 and 21 is 294

Next, find the equivalent fraction of both fractional numbers with denominator 294
For the 1st fraction, since 98 × 3 = 294,
4/98 = 4 × 3/98 × 3 = 12/294
Likewise, for the 2nd fraction, since 21 × 14 = 294,
81/21 = 81 × 14/21 × 14 = 1134/294
Subtract the two like fractions:
12/294 - 1134/294 = 12 - 1134/294 = -1122/294
After reducing the fraction, the answer is -187/49

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