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Add 15/18 and 20/12

1st number: 15/18, 2nd number: 1 8/12

15/18 + 20/12 is 5/2.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 12 is 36

    Next, find the equivalent fraction of both fractional numbers with denominator 36
  2. For the 1st fraction, since 18 × 2 = 36,
    15/18 = 15 × 2/18 × 2 = 30/36
  3. Likewise, for the 2nd fraction, since 12 × 3 = 36,
    20/12 = 20 × 3/12 × 3 = 60/36
  4. Add the two like fractions:
    30/36 + 60/36 = 30 + 60/36 = 90/36
  5. 90/36 simplified gives 5/2
  6. So, 15/18 + 20/12 = 5/2
    In mixed form: 21/2

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