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Add 18/72 and 20/80

18/72 + 20/80 is 1/2.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 80 is 720
  2. For the 1st fraction, since 72 × 10 = 720,
    18/72 = 18 × 10/72 × 10 = 180/720
  3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
    20/80 = 20 × 9/80 × 9 = 180/720
  4. Add the two fractions:
    180/720 + 180/720 = 180 + 180/720 = 360/720
  5. 360/720 simplified gives 1/2
  6. So, 18/72 + 20/80 = 1/2

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