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Subtract 70/42 from 2/81

1st number: 2/81, 2nd number: 1 28/42

2/81 - 70/42 is -133/81.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 81 and 42 is 1134

    Next, find the equivalent fraction of both fractional numbers with denominator 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,
    70/42 = 70 × 27/42 × 27 = 1890/1134
  4. Subtract the two like fractions:
    28/1134 - 1890/1134 = 28 - 1890/1134 = -1862/1134
  5. After reducing the fraction, the answer is -133/81

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