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Add 28/54 and 21/84

28/54 + 21/84 is 83/108.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 54 and 84 is 756

    Next, find the equivalent fraction of both fractional numbers with denominator 756
  2. For the 1st fraction, since 54 × 14 = 756,
    28/54 = 28 × 14/54 × 14 = 392/756
  3. Likewise, for the 2nd fraction, since 84 × 9 = 756,
    21/84 = 21 × 9/84 × 9 = 189/756
  4. Add the two like fractions:
    392/756 + 189/756 = 392 + 189/756 = 581/756
  5. 581/756 simplified gives 83/108
  6. So, 28/54 + 21/84 = 83/108

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