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Add 12/21 and 6/63

12/21 + 6/63 is 2/3.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 63 is 63
  2. For the 1st fraction, since 21 × 3 = 63,
    12/21 = 12 × 3/21 × 3 = 36/63
  3. Likewise, for the 2nd fraction, since 63 × 1 = 63,
    6/63 = 6 × 1/63 × 1 = 6/63
  4. Add the two fractions:
    36/63 + 6/63 = 36 + 6/63 = 42/63
  5. After reducing the fraction, the answer is 2/3

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