Division rounding error

In our old but currently being replace ERP system, some of the files have a
quantity field and a separate field for the number of decimal places in the
quantity field. So you could have a quantity of 12345 with the decimal
field of 2 would actually be 123.45.

In my attempt to not have a large Select statement, I code the calculation
like this:

QtyPer = PZQTY /(10**PSDCC);

So if PZQTY = 12345 and PSDCC = 2 it would calculate to:

QtyPer = 12345/(10**2) = 12345/100 = 123.45

However I am getting a result of 123.499. Has anyone seen this before? Am
I missing something?

Thanks.