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Subtract 35/54 from 6/21

6/21 - 35/54 is -137/378.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 54 is 378
  2. For the 1st fraction, since 21 × 18 = 378,
    6/21 = 6 × 18/21 × 18 = 108/378
  3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
    35/54 = 35 × 7/54 × 7 = 245/378
  4. Subtract the two fractions:
    108/378 - 245/378 = 108 - 245/378 = -137/378

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