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Add 3/81 and 75/20

1st number: 3/81, 2nd number: 3 15/20

3/81 + 75/20 is 409/108.

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,
    3/81 = 3 × 20/81 × 20 = 60/1620
  3. Likewise, for the 2nd fraction, since 20 × 81 = 1620,
    75/20 = 75 × 81/20 × 81 = 6075/1620
  4. Add the two like fractions:
    60/1620 + 6075/1620 = 60 + 6075/1620 = 6135/1620
  5. 6135/1620 simplified gives 409/108
  6. So, 3/81 + 75/20 = 409/108
    In mixed form: 385/108

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