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Add 40/42 and 12/27

40/42 + 12/27 is 88/63.

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,
    40/42 = 40 × 9/42 × 9 = 360/378
  3. Likewise, for the 2nd fraction, since 27 × 14 = 378,
    12/27 = 12 × 14/27 × 14 = 168/378
  4. Add the two like fractions:
    360/378 + 168/378 = 360 + 168/378 = 528/378
  5. 528/378 simplified gives 88/63
  6. So, 40/42 + 12/27 = 88/63
    In mixed form: 125/63

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