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Add 12/18 and 1/21

12/18 + 1/21 is 5/7.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 126
  2. For the 1st fraction, since 18 × 7 = 126,
    12/18 = 12 × 7/18 × 7 = 84/126
  3. Likewise, for the 2nd fraction, since 21 × 6 = 126,
    1/21 = 1 × 6/21 × 6 = 6/126
  4. Add the two like fractions:
    84/126 + 6/126 = 84 + 6/126 = 90/126
  5. 90/126 simplified gives 5/7
  6. So, 12/18 + 1/21 = 5/7

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