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Add 40/80 and 20/84

40/80 + 20/84 is 31/42.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 84 is 1680

    Next, find the equivalent fraction of both fractional numbers with denominator 1680
  2. For the 1st fraction, since 80 × 21 = 1680,
    40/80 = 40 × 21/80 × 21 = 840/1680
  3. Likewise, for the 2nd fraction, since 84 × 20 = 1680,
    20/84 = 20 × 20/84 × 20 = 400/1680
  4. Add the two like fractions:
    840/1680 + 400/1680 = 840 + 400/1680 = 1240/1680
  5. 1240/1680 simplified gives 31/42
  6. So, 40/80 + 20/84 = 31/42

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