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Add 18/80 and 16/90

18/80 + 16/90 is 29/72.

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,
    18/80 = 18 × 9/80 × 9 = 162/720
  3. Likewise, for the 2nd fraction, since 90 × 8 = 720,
    16/90 = 16 × 8/90 × 8 = 128/720
  4. Add the two like fractions:
    162/720 + 128/720 = 162 + 128/720 = 290/720
  5. 290/720 simplified gives 29/72
  6. So, 18/80 + 16/90 = 29/72

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