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Add 36/42 and 30/80

36/42 + 30/80 is 69/56.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 80 is 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,
    30/80 = 30 × 21/80 × 21 = 630/1680
  4. Add the two fractions:
    1440/1680 + 630/1680 = 1440 + 630/1680 = 2070/1680
  5. 2070/1680 simplified gives 69/56
  6. So, 36/42 + 30/80 = 69/56
    In mixed form: 113/56

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