Subtract 21/36 from 20/49
20/49 - 21/36 is -103/588.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 36 is 1764
Next, find the equivalent fraction of both fractional numbers with denominator 1764 - For the 1st fraction, since 49 × 36 = 1764,
20/49 = 20 × 36/49 × 36 = 720/1764 - Likewise, for the 2nd fraction, since 36 × 49 = 1764,
21/36 = 21 × 49/36 × 49 = 1029/1764 - Subtract the two like fractions:
720/1764 - 1029/1764 = 720 - 1029/1764 = -309/1764 - After reducing the fraction, the answer is -103/588
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