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Add 18/80 and 7/72

18/80 + 7/72 is 29/90.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 72 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 72 × 10 = 720,
    7/72 = 7 × 10/72 × 10 = 70/720
  4. Add the two like fractions:
    162/720 + 70/720 = 162 + 70/720 = 232/720
  5. 232/720 simplified gives 29/90
  6. So, 18/80 + 7/72 = 29/90

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