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Add 18/72 and 15/45

18/72 + 15/45 is 7/12.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 45 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 45 × 8 = 360,
    15/45 = 15 × 8/45 × 8 = 120/360
  4. Add the two like fractions:
    90/360 + 120/360 = 90 + 120/360 = 210/360
  5. 210/360 simplified gives 7/12
  6. So, 18/72 + 15/45 = 7/12

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