Subtract 9/18 from 21/98
21/98 - 9/18 is -2/7.
Steps for subtracting fractions
- 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,
21/98 = 21 × 9/98 × 9 = 189/882 - Likewise, for the 2nd fraction, since 18 × 49 = 882,
9/18 = 9 × 49/18 × 49 = 441/882 - Subtract the two like fractions:
189/882 - 441/882 = 189 - 441/882 = -252/882 - After reducing the fraction, the answer is -2/7
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