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Add 18/90 and 45/80

18/90 + 45/80 is 61/80.

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,
    45/80 = 45 × 9/80 × 9 = 405/720
  4. Add the two like fractions:
    144/720 + 405/720 = 144 + 405/720 = 549/720
  5. 549/720 simplified gives 61/80
  6. So, 18/90 + 45/80 = 61/80

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