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Subtract 20/21 from 15/4

1st number: 3 3/4, 2nd number: 20/21

15/4 - 20/21 is 235/84.

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,
    15/4 = 15 × 21/4 × 21 = 315/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    20/21 = 20 × 4/21 × 4 = 80/84
  4. Subtract the two like fractions:
    315/84 - 80/84 = 315 - 80/84 = 235/84
  5. In mixed form: 267/84

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