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Subtract 70/81 from 4/9

4/9 - 70/81 is -34/81.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 81 is 81

    Next, find the equivalent fraction of both fractional numbers with denominator 81
  2. For the 1st fraction, since 9 × 9 = 81,
    4/9 = 4 × 9/9 × 9 = 36/81
  3. Likewise, for the 2nd fraction, since 81 × 1 = 81,
    70/81 = 70 × 1/81 × 1 = 70/81
  4. Subtract the two like fractions:
    36/81 - 70/81 = 36 - 70/81 = -34/81

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