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Add 12/84 and 4/80

12/84 + 4/80 is 27/140.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 80 is 1680
  2. For the 1st fraction, since 84 × 20 = 1680,
    12/84 = 12 × 20/84 × 20 = 240/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    4/80 = 4 × 21/80 × 21 = 84/1680
  4. Add the two fractions:
    240/1680 + 84/1680 = 240 + 84/1680 = 324/1680
  5. 324/1680 simplified gives 27/140
  6. So, 12/84 + 4/80 = 27/140

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