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Add 4/20 and 2/21

4/20 + 2/21 is 31/105.

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,
    4/20 = 4 × 21/20 × 21 = 84/420
  3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
    2/21 = 2 × 20/21 × 20 = 40/420
  4. Add the two like fractions:
    84/420 + 40/420 = 84 + 40/420 = 124/420
  5. 124/420 simplified gives 31/105
  6. So, 4/20 + 2/21 = 31/105

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