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Add 12/28 and 42/21

1st number: 12/28, 2nd number: 2 0/21

12/28 + 42/21 is 17/7.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 21 is 84
  2. For the 1st fraction, since 28 × 3 = 84,
    12/28 = 12 × 3/28 × 3 = 36/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    42/21 = 42 × 4/21 × 4 = 168/84
  4. Add the two fractions:
    36/84 + 168/84 = 36 + 168/84 = 204/84
  5. 204/84 simplified gives 17/7
  6. So, 12/28 + 42/21 = 17/7
    In mixed form: 23/7

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