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Add 54/81 and 30/72

54/81 + 30/72 is 13/12.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 648
  2. For the 1st fraction, since 81 × 8 = 648,
    54/81 = 54 × 8/81 × 8 = 432/648
  3. Likewise, for the 2nd fraction, since 72 × 9 = 648,
    30/72 = 30 × 9/72 × 9 = 270/648
  4. Add the two like fractions:
    432/648 + 270/648 = 432 + 270/648 = 702/648
  5. 702/648 simplified gives 13/12
  6. So, 54/81 + 30/72 = 13/12
    In mixed form: 11/12

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