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Add 1/80 and 21/81

1/80 + 21/81 is 587/2160.

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,
    1/80 = 1 × 81/80 × 81 = 81/6480
  3. Likewise, for the 2nd fraction, since 81 × 80 = 6480,
    21/81 = 21 × 80/81 × 80 = 1680/6480
  4. Add the two like fractions:
    81/6480 + 1680/6480 = 81 + 1680/6480 = 1761/6480
  5. 1761/6480 simplified gives 587/2160
  6. So, 1/80 + 21/81 = 587/2160

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