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Subtract 6/36 from 21/27

21/27 - 6/36 is 11/18.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 27 and 36 is 108

    Next, find the equivalent fraction of both fractional numbers with denominator 108
  2. For the 1st fraction, since 27 × 4 = 108,
    21/27 = 21 × 4/27 × 4 = 84/108
  3. Likewise, for the 2nd fraction, since 36 × 3 = 108,
    6/36 = 6 × 3/36 × 3 = 18/108
  4. Subtract the two like fractions:
    84/108 - 18/108 = 84 - 18/108 = 66/108
  5. After reducing the fraction, the answer is 11/18

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