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Add 9/12 and 20/63

9/12 + 20/63 is 269/252.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 63 is 252
  2. For the 1st fraction, since 12 × 21 = 252,
    9/12 = 9 × 21/12 × 21 = 189/252
  3. Likewise, for the 2nd fraction, since 63 × 4 = 252,
    20/63 = 20 × 4/63 × 4 = 80/252
  4. Add the two fractions:
    189/252 + 80/252 = 189 + 80/252 = 269/252
  5. In mixed form: 117/252

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