I do this in delphi5 not through SQL

--- In IBObjects@y..., Svein Erling Tysvær
<svein.erling.tysvaer@k...> wrote:

> Lee, are you doing this in Delphi or through SQL?
>
> // amount-including-vat divided by 100+vat% times 100
> // (766.05 / (100 + 21.00)) * 100
> // (766.05 / 121) * 100 = 633.0991 the fields are
> // numeric(18,2) so it rounds on two decimals and should give
> // 633.10 but it gives 633.09 what am I doing wrong ?
>
> If through SQL you need to be careful how you do things. I tried

various

> selects and this one seemed to work:
>
> SELECT CAST(766.05 / (121.00/100) AS NUMERIC(18,2))
>
> Note that you need two zeroes after 121 to avoid truncation of 1.21

to

> simply 1. In Delphi you may have to multiply by 100, round and then

divide

> by 100 or check the last digits yourself and increase if necessary.

Just be

> careful to test how it works with large numbers where multiplying

by 100

> isn't possible without exceeding the 18,2.
>
> Set