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Add 12/42 and 3/12

12/42 + 3/12 is 15/28.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 12 is 84
  2. For the 1st fraction, since 42 × 2 = 84,
    12/42 = 12 × 2/42 × 2 = 24/84
  3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
    3/12 = 3 × 7/12 × 7 = 21/84
  4. Add the two fractions:
    24/84 + 21/84 = 24 + 21/84 = 45/84
  5. After reducing the fraction, the answer is 15/28

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