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Add 15/40 and 40/45

15/40 + 40/45 is 91/72.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 45 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 45 × 8 = 360,
    40/45 = 40 × 8/45 × 8 = 320/360
  4. Add the two like fractions:
    135/360 + 320/360 = 135 + 320/360 = 455/360
  5. 455/360 simplified gives 91/72
  6. So, 15/40 + 40/45 = 91/72
    In mixed form: 119/72

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