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Subtract 90/81 from 8/30

1st number: 8/30, 2nd number: 1 9/81

8/30 - 90/81 is -38/45.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 81 is 810

    Next, find the equivalent fraction of both fractional numbers with denominator 810
  2. For the 1st fraction, since 30 × 27 = 810,
    8/30 = 8 × 27/30 × 27 = 216/810
  3. Likewise, for the 2nd fraction, since 81 × 10 = 810,
    90/81 = 90 × 10/81 × 10 = 900/810
  4. Subtract the two like fractions:
    216/810 - 900/810 = 216 - 900/810 = -684/810
  5. After reducing the fraction, the answer is -38/45

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