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Add 12/9 and 21/80

1st number: 1 3/9, 2nd number: 21/80

12/9 + 21/80 is 383/240.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 80 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 9 × 80 = 720,
    12/9 = 12 × 80/9 × 80 = 960/720
  3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
    21/80 = 21 × 9/80 × 9 = 189/720
  4. Add the two like fractions:
    960/720 + 189/720 = 960 + 189/720 = 1149/720
  5. 1149/720 simplified gives 383/240
  6. So, 12/9 + 21/80 = 383/240
    In mixed form: 1143/240

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