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Subtract 15/81 from 15/75

15/75 - 15/81 is 2/135.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 75 and 81 is 2025

    Next, find the equivalent fraction of both fractional numbers with denominator 2025
  2. For the 1st fraction, since 75 × 27 = 2025,
    15/75 = 15 × 27/75 × 27 = 405/2025
  3. Likewise, for the 2nd fraction, since 81 × 25 = 2025,
    15/81 = 15 × 25/81 × 25 = 375/2025
  4. Subtract the two like fractions:
    405/2025 - 375/2025 = 405 - 375/2025 = 30/2025
  5. After reducing the fraction, the answer is 2/135

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