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Add 12/30 and 15/21

12/30 + 15/21 is 39/35.

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,
    15/21 = 15 × 10/21 × 10 = 150/210
  4. Add the two fractions:
    84/210 + 150/210 = 84 + 150/210 = 234/210
  5. 234/210 simplified gives 39/35
  6. So, 12/30 + 15/21 = 39/35
    In mixed form: 14/35

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