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Add 1/21 and 2/5

1/21 + 2/5 is 47/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 5 is 105

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 21 × 5 = 105,
    1/21 = 1 × 5/21 × 5 = 5/105
  3. Likewise, for the 2nd fraction, since 5 × 21 = 105,
    2/5 = 2 × 21/5 × 21 = 42/105
  4. Add the two like fractions:
    5/105 + 42/105 = 5 + 42/105 = 47/105
  5. So, 1/21 + 2/5 = 47/105

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