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Add 42/80 and 3/12

42/80 + 3/12 is 31/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 12 is 240

    Next, find the equivalent fraction of both fractional numbers with denominator 240
  2. For the 1st fraction, since 80 × 3 = 240,
    42/80 = 42 × 3/80 × 3 = 126/240
  3. Likewise, for the 2nd fraction, since 12 × 20 = 240,
    3/12 = 3 × 20/12 × 20 = 60/240
  4. Add the two like fractions:
    126/240 + 60/240 = 126 + 60/240 = 186/240
  5. 186/240 simplified gives 31/40
  6. So, 42/80 + 3/12 = 31/40

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