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Add 16/21 and 5/20

16/21 + 5/20 is 85/84.

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,
    16/21 = 16 × 20/21 × 20 = 320/420
  3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
    5/20 = 5 × 21/20 × 21 = 105/420
  4. Add the two like fractions:
    320/420 + 105/420 = 320 + 105/420 = 425/420
  5. 425/420 simplified gives 85/84
  6. So, 16/21 + 5/20 = 85/84
    In mixed form: 11/84

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