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Add 12/30 and 9/42

12/30 + 9/42 is 43/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 42 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 42 × 5 = 210,
    9/42 = 9 × 5/42 × 5 = 45/210
  4. Add the two fractions:
    84/210 + 45/210 = 84 + 45/210 = 129/210
  5. 129/210 simplified gives 43/70
  6. So, 12/30 + 9/42 = 43/70

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