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Add 1/20 and 1/21

1/20 + 1/21 is 41/420.

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,
    1/20 = 1 × 21/20 × 21 = 21/420
  3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
    1/21 = 1 × 20/21 × 20 = 20/420
  4. Add the two like fractions:
    21/420 + 20/420 = 21 + 20/420 = 41/420
  5. So, 1/20 + 1/21 = 41/420

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