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Add 20/81 and 30/80

20/81 + 30/80 is 403/648.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 6480
  2. For the 1st fraction, since 81 × 80 = 6480,
    20/81 = 20 × 80/81 × 80 = 1600/6480
  3. Likewise, for the 2nd fraction, since 80 × 81 = 6480,
    30/80 = 30 × 81/80 × 81 = 2430/6480
  4. Add the two like fractions:
    1600/6480 + 2430/6480 = 1600 + 2430/6480 = 4030/6480
  5. 4030/6480 simplified gives 403/648
  6. So, 20/81 + 30/80 = 403/648

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