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Add 20/27 and 42/84

20/27 + 42/84 is 67/54.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 27 and 84 is 756

    Next, find the equivalent fraction of both fractional numbers with denominator 756
  2. For the 1st fraction, since 27 × 28 = 756,
    20/27 = 20 × 28/27 × 28 = 560/756
  3. Likewise, for the 2nd fraction, since 84 × 9 = 756,
    42/84 = 42 × 9/84 × 9 = 378/756
  4. Add the two like fractions:
    560/756 + 378/756 = 560 + 378/756 = 938/756
  5. 938/756 simplified gives 67/54
  6. So, 20/27 + 42/84 = 67/54
    In mixed form: 113/54

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