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Add 54/15 and 8/42

1st number: 3 9/15, 2nd number: 8/42

54/15 + 8/42 is 398/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 42 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 15 × 14 = 210,
    54/15 = 54 × 14/15 × 14 = 756/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    8/42 = 8 × 5/42 × 5 = 40/210
  4. Add the two like fractions:
    756/210 + 40/210 = 756 + 40/210 = 796/210
  5. 796/210 simplified gives 398/105
  6. So, 54/15 + 8/42 = 398/105
    In mixed form: 383/105

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