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Add 18/45 and 12/80

18/45 + 12/80 is 11/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 80 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 45 × 16 = 720,
    18/45 = 18 × 16/45 × 16 = 288/720
  3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
    12/80 = 12 × 9/80 × 9 = 108/720
  4. Add the two like fractions:
    288/720 + 108/720 = 288 + 108/720 = 396/720
  5. 396/720 simplified gives 11/20
  6. So, 18/45 + 12/80 = 11/20

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