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Add 8/12 and 3/21

8/12 + 3/21 is 17/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 21 is 84
  2. For the 1st fraction, since 12 × 7 = 84,
    8/12 = 8 × 7/12 × 7 = 56/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    3/21 = 3 × 4/21 × 4 = 12/84
  4. Add the two fractions:
    56/84 + 12/84 = 56 + 12/84 = 68/84
  5. After reducing the fraction, the answer is 17/21

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