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Add 18/81 and 20/5

1st number: 18/81, 2nd number: 4 0/5

18/81 + 20/5 is 38/9.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 81 and 5 is 405
  2. For the 1st fraction, since 81 × 5 = 405,
    18/81 = 18 × 5/81 × 5 = 90/405
  3. Likewise, for the 2nd fraction, since 5 × 81 = 405,
    20/5 = 20 × 81/5 × 81 = 1620/405
  4. Add the two fractions:
    90/405 + 1620/405 = 90 + 1620/405 = 1710/405
  5. 1710/405 simplified gives 38/9
  6. So, 18/81 + 20/5 = 38/9
    In mixed form: 42/9

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