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Add 8/21 and 16/20

8/21 + 16/20 is 124/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 20 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 21 × 20 = 420,
    8/21 = 8 × 20/21 × 20 = 160/420
  3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
    16/20 = 16 × 21/20 × 21 = 336/420
  4. Add the two like fractions:
    160/420 + 336/420 = 160 + 336/420 = 496/420
  5. 496/420 simplified gives 124/105
  6. So, 8/21 + 16/20 = 124/105
    In mixed form: 119/105

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