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Add 12/42 and 5/40

12/42 + 5/40 is 23/56.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 40 is 840
  2. For the 1st fraction, since 42 × 20 = 840,
    12/42 = 12 × 20/42 × 20 = 240/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    5/40 = 5 × 21/40 × 21 = 105/840
  4. Add the two fractions:
    240/840 + 105/840 = 240 + 105/840 = 345/840
  5. 345/840 simplified gives 23/56
  6. So, 12/42 + 5/40 = 23/56

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