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Add 40/42 and 42/80

40/42 + 42/80 is 1241/840.

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,
    40/42 = 40 × 40/42 × 40 = 1600/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    42/80 = 42 × 21/80 × 21 = 882/1680
  4. Add the two like fractions:
    1600/1680 + 882/1680 = 1600 + 882/1680 = 2482/1680
  5. 2482/1680 simplified gives 1241/840
  6. So, 40/42 + 42/80 = 1241/840
    In mixed form: 1401/840

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