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Subtract 10/42 from 84/4

1st number: 21 0/4, 2nd number: 10/42

84/4 - 10/42 is 436/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 42 is 84
  2. For the 1st fraction, since 4 × 21 = 84,
    84/4 = 84 × 21/4 × 21 = 1764/84
  3. Likewise, for the 2nd fraction, since 42 × 2 = 84,
    10/42 = 10 × 2/42 × 2 = 20/84
  4. Subtract the two fractions:
    1764/84 - 20/84 = 1764 - 20/84 = 1744/84
  5. After reducing the fraction, the answer is 436/21
  6. In mixed form: 2016/21

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