Subtract 21/18 from 8/98, Solve 8/98

Subtract 21/18 from 8/98

1^st number: 8/98, 2^nd number: 1 3/18

8/98 - 21/18 is -319/294.

Find the least common denominator or LCM of the two denominators:
LCM of 98 and 18 is 882

Next, find the equivalent fraction of both fractional numbers with denominator 882
For the 1st fraction, since 98 × 9 = 882,
8/98 = 8 × 9/98 × 9 = 72/882
Likewise, for the 2nd fraction, since 18 × 49 = 882,
21/18 = 21 × 49/18 × 49 = 1029/882
Subtract the two like fractions:
72/882 - 1029/882 = 72 - 1029/882 = -957/882
After reducing the fraction, the answer is -319/294

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