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Add 8/21 and 15/80

8/21 + 15/80 is 191/336.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 1680
  2. For the 1st fraction, since 21 × 80 = 1680,
    8/21 = 8 × 80/21 × 80 = 640/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    15/80 = 15 × 21/80 × 21 = 315/1680
  4. Add the two like fractions:
    640/1680 + 315/1680 = 640 + 315/1680 = 955/1680
  5. 955/1680 simplified gives 191/336
  6. So, 8/21 + 15/80 = 191/336

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