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Subtract 35/54 from 15/42

15/42 - 35/54 is -55/189.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 54 is 378

    Next, find the equivalent fraction of both fractional numbers with denominator 378
  2. For the 1st fraction, since 42 × 9 = 378,
    15/42 = 15 × 9/42 × 9 = 135/378
  3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
    35/54 = 35 × 7/54 × 7 = 245/378
  4. Subtract the two like fractions:
    135/378 - 245/378 = 135 - 245/378 = -110/378
  5. After reducing the fraction, the answer is -55/189

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