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Add 18/90 and 15/80

18/90 + 15/80 is 31/80.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 90 × 8 = 720,
    18/90 = 18 × 8/90 × 8 = 144/720
  3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
    15/80 = 15 × 9/80 × 9 = 135/720
  4. Add the two like fractions:
    144/720 + 135/720 = 144 + 135/720 = 279/720
  5. 279/720 simplified gives 31/80
  6. So, 18/90 + 15/80 = 31/80

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