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Add 54/72 and 15/45

54/72 + 15/45 is 13/12.

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,
    54/72 = 54 × 5/72 × 5 = 270/360
  3. Likewise, for the 2nd fraction, since 45 × 8 = 360,
    15/45 = 15 × 8/45 × 8 = 120/360
  4. Add the two like fractions:
    270/360 + 120/360 = 270 + 120/360 = 390/360
  5. 390/360 simplified gives 13/12
  6. So, 54/72 + 15/45 = 13/12
    In mixed form: 11/12

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