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Add 12/42 and 28/30

12/42 + 28/30 is 128/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 30 is 210
  2. For the 1st fraction, since 42 × 5 = 210,
    12/42 = 12 × 5/42 × 5 = 60/210
  3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
    28/30 = 28 × 7/30 × 7 = 196/210
  4. Add the two fractions:
    60/210 + 196/210 = 60 + 196/210 = 256/210
  5. 256/210 simplified gives 128/105
  6. So, 12/42 + 28/30 = 128/105
    In mixed form: 123/105

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