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Add 12/42 and 15/27

12/42 + 15/27 is 53/63.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 27 is 378

    Next, find the equivalent fraction of both fractional numbers with denominator 378
  2. For the 1st fraction, since 42 × 9 = 378,
    12/42 = 12 × 9/42 × 9 = 108/378
  3. Likewise, for the 2nd fraction, since 27 × 14 = 378,
    15/27 = 15 × 14/27 × 14 = 210/378
  4. Add the two like fractions:
    108/378 + 210/378 = 108 + 210/378 = 318/378
  5. 318/378 simplified gives 53/63
  6. So, 12/42 + 15/27 = 53/63

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