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Add 28/72 and 1/81

28/72 + 1/81 is 65/162.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 81 is 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,
    1/81 = 1 × 8/81 × 8 = 8/648
  4. Add the two fractions:
    252/648 + 8/648 = 252 + 8/648 = 260/648
  5. 260/648 simplified gives 65/162
  6. So, 28/72 + 1/81 = 65/162

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