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Add 2/21 and 1/9

2/21 + 1/9 is 13/63.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 9 is 63
  2. For the 1st fraction, since 21 × 3 = 63,
    2/21 = 2 × 3/21 × 3 = 6/63
  3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
    1/9 = 1 × 7/9 × 7 = 7/63
  4. Add the two fractions:
    6/63 + 7/63 = 6 + 7/63 = 13/63
  5. So, 2/21 + 1/9 = 13/63

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