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Add 21/30 and 12/14

21/30 + 12/14 is 109/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 14 is 210
  2. For the 1st fraction, since 30 × 7 = 210,
    21/30 = 21 × 7/30 × 7 = 147/210
  3. Likewise, for the 2nd fraction, since 14 × 15 = 210,
    12/14 = 12 × 15/14 × 15 = 180/210
  4. Add the two fractions:
    147/210 + 180/210 = 147 + 180/210 = 327/210
  5. After reducing the fraction, the answer is 109/70
  6. In mixed form: 139/70

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