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Add 40/42 and 7/12

40/42 + 7/12 is 43/28.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 12 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 42 × 2 = 84,
    40/42 = 40 × 2/42 × 2 = 80/84
  3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
    7/12 = 7 × 7/12 × 7 = 49/84
  4. Add the two like fractions:
    80/84 + 49/84 = 80 + 49/84 = 129/84
  5. 129/84 simplified gives 43/28
  6. So, 40/42 + 7/12 = 43/28
    In mixed form: 115/28

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