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Subtract 18/63 from 81/75

1st number: 1 6/75, 2nd number: 18/63

81/75 - 18/63 is 139/175.

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,
    81/75 = 81 × 21/75 × 21 = 1701/1575
  3. Likewise, for the 2nd fraction, since 63 × 25 = 1575,
    18/63 = 18 × 25/63 × 25 = 450/1575
  4. Subtract the two fractions:
    1701/1575 - 450/1575 = 1701 - 450/1575 = 1251/1575
  5. After reducing the fraction, the answer is 139/175

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