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Add 21/28 and 28/54

21/28 + 28/54 is 137/108.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 54 is 756

    Next, find the equivalent fraction of both fractional numbers with denominator 756
  2. For the 1st fraction, since 28 × 27 = 756,
    21/28 = 21 × 27/28 × 27 = 567/756
  3. Likewise, for the 2nd fraction, since 54 × 14 = 756,
    28/54 = 28 × 14/54 × 14 = 392/756
  4. Add the two like fractions:
    567/756 + 392/756 = 567 + 392/756 = 959/756
  5. 959/756 simplified gives 137/108
  6. So, 21/28 + 28/54 = 137/108
    In mixed form: 129/108

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