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Subtract 3/21 from 63/15

1st number: 4 3/15, 2nd number: 3/21

63/15 - 3/21 is 142/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 21 is 105
  2. For the 1st fraction, since 15 × 7 = 105,
    63/15 = 63 × 7/15 × 7 = 441/105
  3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
    3/21 = 3 × 5/21 × 5 = 15/105
  4. Subtract the two fractions:
    441/105 - 15/105 = 441 - 15/105 = 426/105
  5. After reducing the fraction, the answer is 142/35
  6. In mixed form: 42/35

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