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Add 12/80 and 80/90

12/80 + 80/90 is 187/180.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 90 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 80 × 9 = 720,
    12/80 = 12 × 9/80 × 9 = 108/720
  3. Likewise, for the 2nd fraction, since 90 × 8 = 720,
    80/90 = 80 × 8/90 × 8 = 640/720
  4. Add the two like fractions:
    108/720 + 640/720 = 108 + 640/720 = 748/720
  5. 748/720 simplified gives 187/180
  6. So, 12/80 + 80/90 = 187/180
    In mixed form: 17/180

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