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Add 12/42 and 6/9

12/42 + 6/9 is 20/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 9 is 126
  2. For the 1st fraction, since 42 × 3 = 126,
    12/42 = 12 × 3/42 × 3 = 36/126
  3. Likewise, for the 2nd fraction, since 9 × 14 = 126,
    6/9 = 6 × 14/9 × 14 = 84/126
  4. Add the two fractions:
    36/126 + 84/126 = 36 + 84/126 = 120/126
  5. After reducing the fraction, the answer is 20/21

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