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Add 21/12 and 1/18

1st number: 1 9/12, 2nd number: 1/18

21/12 + 1/18 is 65/36.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 36
  2. For the 1st fraction, since 12 × 3 = 36,
    21/12 = 21 × 3/12 × 3 = 63/36
  3. Likewise, for the 2nd fraction, since 18 × 2 = 36,
    1/18 = 1 × 2/18 × 2 = 2/36
  4. Add the two like fractions:
    63/36 + 2/36 = 63 + 2/36 = 65/36
  5. So, 21/12 + 1/18 = 65/36
    In mixed form: 129/36

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