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Subtract 4/21 from 5/4

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

5/4 - 4/21 is 89/84.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 21 is 84
  2. For the 1st fraction, since 4 × 21 = 84,
    5/4 = 5 × 21/4 × 21 = 105/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    4/21 = 4 × 4/21 × 4 = 16/84
  4. Subtract the two fractions:
    105/84 - 16/84 = 105 - 16/84 = 89/84
  5. In mixed form: 15/84

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