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Subtract 10/42 from 2/81

2/81 - 10/42 is -121/567.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 81 and 42 is 1134
  2. For the 1st fraction, since 81 × 14 = 1134,
    2/81 = 2 × 14/81 × 14 = 28/1134
  3. Likewise, for the 2nd fraction, since 42 × 27 = 1134,
    10/42 = 10 × 27/42 × 27 = 270/1134
  4. Subtract the two fractions:
    28/1134 - 270/1134 = 28 - 270/1134 = -242/1134
  5. After reducing the fraction, the answer is -121/567

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