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Add 12/10 and 15/42

1st number: 1 2/10, 2nd number: 15/42

12/10 + 15/42 is 109/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 42 is 210
  2. For the 1st fraction, since 10 × 21 = 210,
    12/10 = 12 × 21/10 × 21 = 252/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    15/42 = 15 × 5/42 × 5 = 75/210
  4. Add the two fractions:
    252/210 + 75/210 = 252 + 75/210 = 327/210
  5. After reducing the fraction, the answer is 109/70
  6. In mixed form: 139/70

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