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Add 10/12 and 2/21

10/12 + 2/21 is 13/14.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 21 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 12 × 7 = 84,
    10/12 = 10 × 7/12 × 7 = 70/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    2/21 = 2 × 4/21 × 4 = 8/84
  4. Add the two like fractions:
    70/84 + 8/84 = 70 + 8/84 = 78/84
  5. 78/84 simplified gives 13/14
  6. So, 10/12 + 2/21 = 13/14

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