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Add 4/21 and 16/80

4/21 + 16/80 is 41/105.

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,
    4/21 = 4 × 80/21 × 80 = 320/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    16/80 = 16 × 21/80 × 21 = 336/1680
  4. Add the two like fractions:
    320/1680 + 336/1680 = 320 + 336/1680 = 656/1680
  5. 656/1680 simplified gives 41/105
  6. So, 4/21 + 16/80 = 41/105

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