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Add 25/42 and 35/80

25/42 + 35/80 is 347/336.

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,
    25/42 = 25 × 40/42 × 40 = 1000/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    35/80 = 35 × 21/80 × 21 = 735/1680
  4. Add the two fractions:
    1000/1680 + 735/1680 = 1000 + 735/1680 = 1735/1680
  5. 1735/1680 simplified gives 347/336
  6. So, 25/42 + 35/80 = 347/336
    In mixed form: 111/336

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