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Subtract 9/84 from 63/42

1st number: 1 21/42, 2nd number: 9/84

63/42 - 9/84 is 39/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 84 is 84
  2. For the 1st fraction, since 42 × 2 = 84,
    63/42 = 63 × 2/42 × 2 = 126/84
  3. Likewise, for the 2nd fraction, since 84 × 1 = 84,
    9/84 = 9 × 1/84 × 1 = 9/84
  4. Subtract the two fractions:
    126/84 - 9/84 = 126 - 9/84 = 117/84
  5. After reducing the fraction, the answer is 39/28
  6. In mixed form: 111/28

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