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Subtract 21/27 from 1/4

1/4 - 21/27 is -19/36.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 27 is 108

    Next, find the equivalent fraction of both fractional numbers with denominator 108
  2. For the 1st fraction, since 4 × 27 = 108,
    1/4 = 1 × 27/4 × 27 = 27/108
  3. Likewise, for the 2nd fraction, since 27 × 4 = 108,
    21/27 = 21 × 4/27 × 4 = 84/108
  4. Subtract the two like fractions:
    27/108 - 84/108 = 27 - 84/108 = -57/108
  5. After reducing the fraction, the answer is -19/36

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