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Add 12/40 and 12/42

12/40 + 12/42 is 41/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 42 is 840

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 40 × 21 = 840,
    12/40 = 12 × 21/40 × 21 = 252/840
  3. Likewise, for the 2nd fraction, since 42 × 20 = 840,
    12/42 = 12 × 20/42 × 20 = 240/840
  4. Add the two like fractions:
    252/840 + 240/840 = 252 + 240/840 = 492/840
  5. 492/840 simplified gives 41/70
  6. So, 12/40 + 12/42 = 41/70

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