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Subtract 14/27 from 9/21

9/21 - 14/27 is -17/189.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 27 is 189

    Next, find the equivalent fraction of both fractional numbers with denominator 189
  2. For the 1st fraction, since 21 × 9 = 189,
    9/21 = 9 × 9/21 × 9 = 81/189
  3. Likewise, for the 2nd fraction, since 27 × 7 = 189,
    14/27 = 14 × 7/27 × 7 = 98/189
  4. Subtract the two like fractions:
    81/189 - 98/189 = 81 - 98/189 = -17/189

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