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Add 12/30 and 3/21

12/30 + 3/21 is 19/35.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 21 is 210
  2. For the 1st fraction, since 30 × 7 = 210,
    12/30 = 12 × 7/30 × 7 = 84/210
  3. Likewise, for the 2nd fraction, since 21 × 10 = 210,
    3/21 = 3 × 10/21 × 10 = 30/210
  4. Add the two fractions:
    84/210 + 30/210 = 84 + 30/210 = 114/210
  5. After reducing the fraction, the answer is 19/35

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