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Subtract 6/81 from 9/15

9/15 - 6/81 is 71/135.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 81 is 405
  2. For the 1st fraction, since 15 × 27 = 405,
    9/15 = 9 × 27/15 × 27 = 243/405
  3. Likewise, for the 2nd fraction, since 81 × 5 = 405,
    6/81 = 6 × 5/81 × 5 = 30/405
  4. Subtract the two fractions:
    243/405 - 30/405 = 243 - 30/405 = 213/405
  5. After reducing the fraction, the answer is 71/135

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