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Add 3/20 and 9/28

3/20 + 9/28 is 33/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 28 is 140
  2. For the 1st fraction, since 20 × 7 = 140,
    3/20 = 3 × 7/20 × 7 = 21/140
  3. Likewise, for the 2nd fraction, since 28 × 5 = 140,
    9/28 = 9 × 5/28 × 5 = 45/140
  4. Add the two fractions:
    21/140 + 45/140 = 21 + 45/140 = 66/140
  5. After reducing the fraction, the answer is 33/70

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