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Add 25/20 and 21/9

1st number: 1 5/20, 2nd number: 2 3/9

25/20 + 21/9 is 43/12.

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,
    25/20 = 25 × 9/20 × 9 = 225/180
  3. Likewise, for the 2nd fraction, since 9 × 20 = 180,
    21/9 = 21 × 20/9 × 20 = 420/180
  4. Add the two fractions:
    225/180 + 420/180 = 225 + 420/180 = 645/180
  5. After reducing the fraction, the answer is 43/12
  6. In mixed form: 37/12

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