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Subtract 25/21 from 1/4

1st number: 1/4, 2nd number: 1 4/21

1/4 - 25/21 is -79/84.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 21 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 4 × 21 = 84,
    1/4 = 1 × 21/4 × 21 = 21/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    25/21 = 25 × 4/21 × 4 = 100/84
  4. Subtract the two like fractions:
    21/84 - 100/84 = 21 - 100/84 = -79/84

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