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Add 12/8 and 4/21

1st number: 1 4/8, 2nd number: 4/21

12/8 + 4/21 is 71/42.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 21 is 168
  2. For the 1st fraction, since 8 × 21 = 168,
    12/8 = 12 × 21/8 × 21 = 252/168
  3. Likewise, for the 2nd fraction, since 21 × 8 = 168,
    4/21 = 4 × 8/21 × 8 = 32/168
  4. Add the two fractions:
    252/168 + 32/168 = 252 + 32/168 = 284/168
  5. 284/168 simplified gives 71/42
  6. So, 12/8 + 4/21 = 71/42
    In mixed form: 129/42

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