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Add 21/2 and 15/18

1st number: 10 1/2, 2nd number: 15/18

21/2 + 15/18 is 34/3.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 18 is 18

    Next, find the equivalent fraction of both fractional numbers with denominator 18
  2. For the 1st fraction, since 2 × 9 = 18,
    21/2 = 21 × 9/2 × 9 = 189/18
  3. Likewise, for the 2nd fraction, since 18 × 1 = 18,
    15/18 = 15 × 1/18 × 1 = 15/18
  4. Add the two like fractions:
    189/18 + 15/18 = 189 + 15/18 = 204/18
  5. 204/18 simplified gives 34/3
  6. So, 21/2 + 15/18 = 34/3
    In mixed form: 111/3

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