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Subtract 16/42 from 21/4

1st number: 5 1/4, 2nd number: 16/42

21/4 - 16/42 is 409/84.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 42 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 4 × 21 = 84,
    21/4 = 21 × 21/4 × 21 = 441/84
  3. Likewise, for the 2nd fraction, since 42 × 2 = 84,
    16/42 = 16 × 2/42 × 2 = 32/84
  4. Subtract the two like fractions:
    441/84 - 32/84 = 441 - 32/84 = 409/84
  5. In mixed form: 473/84

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