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Add 16/21 and 3/18

16/21 + 3/18 is 13/14.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 18 is 126

    Next, find the equivalent fraction of both fractional numbers with denominator 126
  2. For the 1st fraction, since 21 × 6 = 126,
    16/21 = 16 × 6/21 × 6 = 96/126
  3. Likewise, for the 2nd fraction, since 18 × 7 = 126,
    3/18 = 3 × 7/18 × 7 = 21/126
  4. Add the two like fractions:
    96/126 + 21/126 = 96 + 21/126 = 117/126
  5. 117/126 simplified gives 13/14
  6. So, 16/21 + 3/18 = 13/14

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