Subtract 21/9 from 28/98, Solve 28/98

Subtract 21/9 from 28/98

1^st number: 28/98, 2^nd number: 2 3/9

28/98 - 21/9 is -43/21.

Find the least common denominator or LCM of the two denominators:
LCM of 98 and 9 is 882

Next, find the equivalent fraction of both fractional numbers with denominator 882
For the 1st fraction, since 98 × 9 = 882,
28/98 = 28 × 9/98 × 9 = 252/882
Likewise, for the 2nd fraction, since 9 × 98 = 882,
21/9 = 21 × 98/9 × 98 = 2058/882
Subtract the two like fractions:
252/882 - 2058/882 = 252 - 2058/882 = -1806/882
After reducing the fraction, the answer is -43/21

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