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Add 18/40 and 18/72

18/40 + 18/72 is 7/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 72 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 40 × 9 = 360,
    18/40 = 18 × 9/40 × 9 = 162/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    18/72 = 18 × 5/72 × 5 = 90/360
  4. Add the two like fractions:
    162/360 + 90/360 = 162 + 90/360 = 252/360
  5. 252/360 simplified gives 7/10
  6. So, 18/40 + 18/72 = 7/10

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