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Subtract 10/81 from 2/21

2/21 - 10/81 is -16/567.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 81 is 567
  2. For the 1st fraction, since 21 × 27 = 567,
    2/21 = 2 × 27/21 × 27 = 54/567
  3. Likewise, for the 2nd fraction, since 81 × 7 = 567,
    10/81 = 10 × 7/81 × 7 = 70/567
  4. Subtract the two fractions:
    54/567 - 70/567 = 54 - 70/567 = -16/567

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