Subtract 30/36 from 21/98
21/98 - 30/36 is -13/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 36 is 1764
Next, find the equivalent fraction of both fractional numbers with denominator 1764 - For the 1st fraction, since 98 × 18 = 1764,
21/98 = 21 × 18/98 × 18 = 378/1764 - Likewise, for the 2nd fraction, since 36 × 49 = 1764,
30/36 = 30 × 49/36 × 49 = 1470/1764 - Subtract the two like fractions:
378/1764 - 1470/1764 = 378 - 1470/1764 = -1092/1764 - After reducing the fraction, the answer is -13/21
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