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Add 18/15 and 81/36

1st number: 1 3/15, 2nd number: 2 9/36

18/15 + 81/36 is 69/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 36 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 15 × 12 = 180,
    18/15 = 18 × 12/15 × 12 = 216/180
  3. Likewise, for the 2nd fraction, since 36 × 5 = 180,
    81/36 = 81 × 5/36 × 5 = 405/180
  4. Add the two like fractions:
    216/180 + 405/180 = 216 + 405/180 = 621/180
  5. 621/180 simplified gives 69/20
  6. So, 18/15 + 81/36 = 69/20
    In mixed form: 39/20

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