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Add 3/40 and 21/9

1st number: 3/40, 2nd number: 2 3/9

3/40 + 21/9 is 289/120.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 9 is 360
  2. For the 1st fraction, since 40 × 9 = 360,
    3/40 = 3 × 9/40 × 9 = 27/360
  3. Likewise, for the 2nd fraction, since 9 × 40 = 360,
    21/9 = 21 × 40/9 × 40 = 840/360
  4. Add the two fractions:
    27/360 + 840/360 = 27 + 840/360 = 867/360
  5. After reducing the fraction, the answer is 289/120
  6. In mixed form: 249/120

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