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Add 9/80 and 9/81

9/80 + 9/81 is 161/720.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 81 is 6480

    Next, find the equivalent fraction of both fractional numbers with denominator 6480
  2. For the 1st fraction, since 80 × 81 = 6480,
    9/80 = 9 × 81/80 × 81 = 729/6480
  3. Likewise, for the 2nd fraction, since 81 × 80 = 6480,
    9/81 = 9 × 80/81 × 80 = 720/6480
  4. Add the two like fractions:
    729/6480 + 720/6480 = 729 + 720/6480 = 1449/6480
  5. 1449/6480 simplified gives 161/720
  6. So, 9/80 + 9/81 = 161/720

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