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Subtract 8/81 from 9/30

9/30 - 8/81 is 163/810.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 81 is 810
  2. For the 1st fraction, since 30 × 27 = 810,
    9/30 = 9 × 27/30 × 27 = 243/810
  3. Likewise, for the 2nd fraction, since 81 × 10 = 810,
    8/81 = 8 × 10/81 × 10 = 80/810
  4. Subtract the two fractions:
    243/810 - 80/810 = 243 - 80/810 = 163/810

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