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Add 18/81 and 30/20

1st number: 18/81, 2nd number: 1 10/20

18/81 + 30/20 is 31/18.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 81 and 20 is 1620

    Next, find the equivalent fraction of both fractional numbers with denominator 1620
  2. For the 1st fraction, since 81 × 20 = 1620,
    18/81 = 18 × 20/81 × 20 = 360/1620
  3. Likewise, for the 2nd fraction, since 20 × 81 = 1620,
    30/20 = 30 × 81/20 × 81 = 2430/1620
  4. Add the two like fractions:
    360/1620 + 2430/1620 = 360 + 2430/1620 = 2790/1620
  5. 2790/1620 simplified gives 31/18
  6. So, 18/81 + 30/20 = 31/18
    In mixed form: 113/18

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