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Add 28/72 and 3/81

28/72 + 3/81 is 23/54.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 81 is 648

    Next, find the equivalent fraction of both fractional numbers with denominator 648
  2. For the 1st fraction, since 72 × 9 = 648,
    28/72 = 28 × 9/72 × 9 = 252/648
  3. Likewise, for the 2nd fraction, since 81 × 8 = 648,
    3/81 = 3 × 8/81 × 8 = 24/648
  4. Add the two like fractions:
    252/648 + 24/648 = 252 + 24/648 = 276/648
  5. 276/648 simplified gives 23/54
  6. So, 28/72 + 3/81 = 23/54

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