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Subtract 54/63 from 18/75

18/75 - 54/63 is -108/175.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 75 and 63 is 1575
  2. For the 1st fraction, since 75 × 21 = 1575,
    18/75 = 18 × 21/75 × 21 = 378/1575
  3. Likewise, for the 2nd fraction, since 63 × 25 = 1575,
    54/63 = 54 × 25/63 × 25 = 1350/1575
  4. Subtract the two fractions:
    378/1575 - 1350/1575 = 378 - 1350/1575 = -972/1575
  5. After reducing the fraction, the answer is -108/175

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