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Add 18/72 and 24/40

18/72 + 24/40 is 17/20.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 72 × 5 = 360,
    18/72 = 18 × 5/72 × 5 = 90/360
  3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
    24/40 = 24 × 9/40 × 9 = 216/360
  4. Add the two like fractions:
    90/360 + 216/360 = 90 + 216/360 = 306/360
  5. 306/360 simplified gives 17/20
  6. So, 18/72 + 24/40 = 17/20

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