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Add 28/40 and 75/90

28/40 + 75/90 is 23/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 90 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 40 × 9 = 360,
    28/40 = 28 × 9/40 × 9 = 252/360
  3. Likewise, for the 2nd fraction, since 90 × 4 = 360,
    75/90 = 75 × 4/90 × 4 = 300/360
  4. Add the two like fractions:
    252/360 + 300/360 = 252 + 300/360 = 552/360
  5. 552/360 simplified gives 23/15
  6. So, 28/40 + 75/90 = 23/15
    In mixed form: 18/15

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