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Add 9/80 and 5/4

1st number: 9/80, 2nd number: 1 1/4

9/80 + 5/4 is 109/80.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 4 is 80
  2. For the 1st fraction, since 80 × 1 = 80,
    9/80 = 9 × 1/80 × 1 = 9/80
  3. Likewise, for the 2nd fraction, since 4 × 20 = 80,
    5/4 = 5 × 20/4 × 20 = 100/80
  4. Add the two fractions:
    9/80 + 100/80 = 9 + 100/80 = 109/80
  5. In mixed form: 129/80

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