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Add 20/12 and 15/9

1st number: 1 8/12, 2nd number: 1 6/9

20/12 + 15/9 is 10/3.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 9 is 36

    Next, find the equivalent fraction of both fractional numbers with denominator 36
  2. For the 1st fraction, since 12 × 3 = 36,
    20/12 = 20 × 3/12 × 3 = 60/36
  3. Likewise, for the 2nd fraction, since 9 × 4 = 36,
    15/9 = 15 × 4/9 × 4 = 60/36
  4. Add the two like fractions:
    60/36 + 60/36 = 60 + 60/36 = 120/36
  5. 120/36 simplified gives 10/3
  6. So, 20/12 + 15/9 = 10/3
    In mixed form: 31/3

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