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Subtract 3/27 from 2/21

2/21 - 3/27 is -1/63.

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,
    2/21 = 2 × 9/21 × 9 = 18/189
  3. Likewise, for the 2nd fraction, since 27 × 7 = 189,
    3/27 = 3 × 7/27 × 7 = 21/189
  4. Subtract the two like fractions:
    18/189 - 21/189 = 18 - 21/189 = -3/189
  5. After reducing the fraction, the answer is -1/63

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