• I have to go with the 'calculation is wrong' group.  While the integer vs decimal part is also a problem, the first and foremost problem is the calculation is dead wrong and would never provide a correct result.  Now if part of the intention was to have an incorrect calculation as a distraction from the integer vs decimal piece of the puzzle then bravo, point taken. 

    However a simpler question to make the same point would be more like

    why does    select 5/10 not = .5?

    Just saying....