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Add 12/35 and 42/54

12/35 + 42/54 is 353/315.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 35 and 54 is 1890
  2. For the 1st fraction, since 35 × 54 = 1890,
    12/35 = 12 × 54/35 × 54 = 648/1890
  3. Likewise, for the 2nd fraction, since 54 × 35 = 1890,
    42/54 = 42 × 35/54 × 35 = 1470/1890
  4. Add the two fractions:
    648/1890 + 1470/1890 = 648 + 1470/1890 = 2118/1890
  5. After reducing the fraction, the answer is 353/315
  6. In mixed form: 138/315

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