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Add 8/80 and 3/21

8/80 + 3/21 is 17/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 21 is 1680

    Next, find the equivalent fraction of both fractional numbers with denominator 1680
  2. For the 1st fraction, since 80 × 21 = 1680,
    8/80 = 8 × 21/80 × 21 = 168/1680
  3. Likewise, for the 2nd fraction, since 21 × 80 = 1680,
    3/21 = 3 × 80/21 × 80 = 240/1680
  4. Add the two like fractions:
    168/1680 + 240/1680 = 168 + 240/1680 = 408/1680
  5. 408/1680 simplified gives 17/70
  6. So, 8/80 + 3/21 = 17/70

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