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Add 72/18 and 15/40

1st number: 4 0/18, 2nd number: 15/40

72/18 + 15/40 is 35/8.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 40 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 18 × 20 = 360,
    72/18 = 72 × 20/18 × 20 = 1440/360
  3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
    15/40 = 15 × 9/40 × 9 = 135/360
  4. Add the two like fractions:
    1440/360 + 135/360 = 1440 + 135/360 = 1575/360
  5. 1575/360 simplified gives 35/8
  6. So, 72/18 + 15/40 = 35/8
    In mixed form: 43/8

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