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Add 20/60 and 1/21

20/60 + 1/21 is 8/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 60 and 21 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 60 × 7 = 420,
    20/60 = 20 × 7/60 × 7 = 140/420
  3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
    1/21 = 1 × 20/21 × 20 = 20/420
  4. Add the two like fractions:
    140/420 + 20/420 = 140 + 20/420 = 160/420
  5. 160/420 simplified gives 8/21
  6. So, 20/60 + 1/21 = 8/21

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