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Add 25/42 and 21/80

25/42 + 21/80 is 1441/1680.

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,
    25/42 = 25 × 40/42 × 40 = 1000/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    21/80 = 21 × 21/80 × 21 = 441/1680
  4. Add the two like fractions:
    1000/1680 + 441/1680 = 1000 + 441/1680 = 1441/1680
  5. So, 25/42 + 21/80 = 1441/1680

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