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Add 36/42 and 12/80

36/42 + 12/80 is 141/140.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 80 is 1680

    Next, find the equivalent fraction of both fractional numbers with denominator 1680
  2. For the 1st fraction, since 42 × 40 = 1680,
    36/42 = 36 × 40/42 × 40 = 1440/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    12/80 = 12 × 21/80 × 21 = 252/1680
  4. Add the two like fractions:
    1440/1680 + 252/1680 = 1440 + 252/1680 = 1692/1680
  5. 1692/1680 simplified gives 141/140
  6. So, 36/42 + 12/80 = 141/140
    In mixed form: 11/140

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