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Subtract 27/49 from 4/21

4/21 - 27/49 is -53/147.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 49 is 147
  2. For the 1st fraction, since 21 × 7 = 147,
    4/21 = 4 × 7/21 × 7 = 28/147
  3. Likewise, for the 2nd fraction, since 49 × 3 = 147,
    27/49 = 27 × 3/49 × 3 = 81/147
  4. Subtract the two fractions:
    28/147 - 81/147 = 28 - 81/147 = -53/147

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