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Add 9/20 and 4/9

9/20 + 4/9 is 161/180.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 9 is 180
  2. For the 1st fraction, since 20 × 9 = 180,
    9/20 = 9 × 9/20 × 9 = 81/180
  3. Likewise, for the 2nd fraction, since 9 × 20 = 180,
    4/9 = 4 × 20/9 × 20 = 80/180
  4. Add the two fractions:
    81/180 + 80/180 = 81 + 80/180 = 161/180

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