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Subtract 3/81 from 18/75

18/75 - 3/81 is 137/675.

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,
    18/75 = 18 × 27/75 × 27 = 486/2025
  3. Likewise, for the 2nd fraction, since 81 × 25 = 2025,
    3/81 = 3 × 25/81 × 25 = 75/2025
  4. Subtract the two like fractions:
    486/2025 - 75/2025 = 486 - 75/2025 = 411/2025
  5. After reducing the fraction, the answer is 137/675

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