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Add 3/9 and 4/20

3/9 + 4/20 is 8/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 20 is 180
  2. For the 1st fraction, since 9 × 20 = 180,
    3/9 = 3 × 20/9 × 20 = 60/180
  3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
    4/20 = 4 × 9/20 × 9 = 36/180
  4. Add the two fractions:
    60/180 + 36/180 = 60 + 36/180 = 96/180
  5. After reducing the fraction, the answer is 8/15

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