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Add 30/18 and 80/42

1st number: 1 12/18, 2nd number: 1 38/42

30/18 + 80/42 is 25/7.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 42 is 126

    Next, find the equivalent fraction of both fractional numbers with denominator 126
  2. For the 1st fraction, since 18 × 7 = 126,
    30/18 = 30 × 7/18 × 7 = 210/126
  3. Likewise, for the 2nd fraction, since 42 × 3 = 126,
    80/42 = 80 × 3/42 × 3 = 240/126
  4. Add the two like fractions:
    210/126 + 240/126 = 210 + 240/126 = 450/126
  5. 450/126 simplified gives 25/7
  6. So, 30/18 + 80/42 = 25/7
    In mixed form: 34/7

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