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Subtract 3/21 from 63/42

1st number: 1 21/42, 2nd number: 3/21

63/42 - 3/21 is 19/14.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 21 is 42
  2. For the 1st fraction, since 42 × 1 = 42,
    63/42 = 63 × 1/42 × 1 = 63/42
  3. Likewise, for the 2nd fraction, since 21 × 2 = 42,
    3/21 = 3 × 2/21 × 2 = 6/42
  4. Subtract the two fractions:
    63/42 - 6/42 = 63 - 6/42 = 57/42
  5. After reducing the fraction, the answer is 19/14
  6. In mixed form: 15/14

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