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Add 4/20 and 4/21

4/20 + 4/21 is 41/105.

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,
    4/21 = 4 × 20/21 × 20 = 80/420
  4. Add the two like fractions:
    84/420 + 80/420 = 84 + 80/420 = 164/420
  5. 164/420 simplified gives 41/105
  6. So, 4/20 + 4/21 = 41/105

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