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Add 20/80 and 10/42

20/80 + 10/42 is 41/84.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 42 is 1680

    Next, find the equivalent fraction of both fractional numbers with denominator 1680
  2. For the 1st fraction, since 80 × 21 = 1680,
    20/80 = 20 × 21/80 × 21 = 420/1680
  3. Likewise, for the 2nd fraction, since 42 × 40 = 1680,
    10/42 = 10 × 40/42 × 40 = 400/1680
  4. Add the two like fractions:
    420/1680 + 400/1680 = 420 + 400/1680 = 820/1680
  5. 820/1680 simplified gives 41/84
  6. So, 20/80 + 10/42 = 41/84

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