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Subtract 25/18 from 21/75

1st number: 21/75, 2nd number: 1 7/18

21/75 - 25/18 is -499/450.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 75 and 18 is 450
  2. For the 1st fraction, since 75 × 6 = 450,
    21/75 = 21 × 6/75 × 6 = 126/450
  3. Likewise, for the 2nd fraction, since 18 × 25 = 450,
    25/18 = 25 × 25/18 × 25 = 625/450
  4. Subtract the two fractions:
    126/450 - 625/450 = 126 - 625/450 = -499/450

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