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Subtract 21/63 from 12/75

12/75 - 21/63 is -13/75.

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,
    12/75 = 12 × 21/75 × 21 = 252/1575
  3. Likewise, for the 2nd fraction, since 63 × 25 = 1575,
    21/63 = 21 × 25/63 × 25 = 525/1575
  4. Subtract the two fractions:
    252/1575 - 525/1575 = 252 - 525/1575 = -273/1575
  5. After reducing the fraction, the answer is -13/75

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