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Subtract 25/28 from 4/21

4/21 - 25/28 is -59/84.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 28 is 84
  2. For the 1st fraction, since 21 × 4 = 84,
    4/21 = 4 × 4/21 × 4 = 16/84
  3. Likewise, for the 2nd fraction, since 28 × 3 = 84,
    25/28 = 25 × 3/28 × 3 = 75/84
  4. Subtract the two fractions:
    16/84 - 75/84 = 16 - 75/84 = -59/84

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