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Subtract 90/81 from 4/75

1st number: 4/75, 2nd number: 1 9/81

4/75 - 90/81 is -238/225.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 75 and 81 is 2025
  2. For the 1st fraction, since 75 × 27 = 2025,
    4/75 = 4 × 27/75 × 27 = 108/2025
  3. Likewise, for the 2nd fraction, since 81 × 25 = 2025,
    90/81 = 90 × 25/81 × 25 = 2250/2025
  4. Subtract the two fractions:
    108/2025 - 2250/2025 = 108 - 2250/2025 = -2142/2025
  5. After reducing the fraction, the answer is -238/225

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