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Add 16/20 and 40/21

1st number: 16/20, 2nd number: 1 19/21

16/20 + 40/21 is 284/105.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 20 × 21 = 420,
    16/20 = 16 × 21/20 × 21 = 336/420
  3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
    40/21 = 40 × 20/21 × 20 = 800/420
  4. Add the two like fractions:
    336/420 + 800/420 = 336 + 800/420 = 1136/420
  5. 1136/420 simplified gives 284/105
  6. So, 16/20 + 40/21 = 284/105
    In mixed form: 274/105

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