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Add 15/40 and 54/72

15/40 + 54/72 is 9/8.

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,
    15/40 = 15 × 9/40 × 9 = 135/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    54/72 = 54 × 5/72 × 5 = 270/360
  4. Add the two like fractions:
    135/360 + 270/360 = 135 + 270/360 = 405/360
  5. 405/360 simplified gives 9/8
  6. So, 15/40 + 54/72 = 9/8
    In mixed form: 11/8

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