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Add 20/72 and 1/81

20/72 + 1/81 is 47/162.

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,
    20/72 = 20 × 9/72 × 9 = 180/648
  3. Likewise, for the 2nd fraction, since 81 × 8 = 648,
    1/81 = 1 × 8/81 × 8 = 8/648
  4. Add the two fractions:
    180/648 + 8/648 = 180 + 8/648 = 188/648
  5. 188/648 simplified gives 47/162
  6. So, 20/72 + 1/81 = 47/162

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