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Subtract 1/7 from 1/27

1/27 - 1/7 is -20/189.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 27 and 7 is 189

    Next, find the equivalent fraction of both fractional numbers with denominator 189
  2. For the 1st fraction, since 27 × 7 = 189,
    1/27 = 1 × 7/27 × 7 = 7/189
  3. Likewise, for the 2nd fraction, since 7 × 27 = 189,
    1/7 = 1 × 27/7 × 27 = 27/189
  4. Subtract the two like fractions:
    7/189 - 27/189 = 7 - 27/189 = -20/189

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