Le 20/12/2011 22:28, Dominik Wnęk a écrit :

Hello,

`I have a problem with the way SUM works. At first I thought this was a
``bug, but then I saw Numbers on my iPad doing the same thing, so now I
``believe this is by design, but I have no idea why and how I can work
``around this.
`
Take a look at this example:
http://www.ode2.com/images/libreoffice_sum.tiff

`The number format is currency (Polish Zloty), the numbers in the left
``column are entered by hand, the ones in the right one are calculated
``by multiplying the left number by 1,22.
`

`The sum of the numbers in the right-hand column should be -1199,62,
``but it is off by 0,02 zł. It's pretty obvious this is because the
``program sums the numbers it has in memory and not the ones it displays.
`

`If this behaviour is correct, how can I work around this? I just spent
``40 minutes trying to find out why my balance is wrong only to find out
``the sums I was doing were giving me incorrect amounts :/
`
Thanks,

Good evening Dominik,

`The solution to calculate has you see (It's a wrong way to do that the
``result is false) consist in using the formula =ROUND("cell to
``multiply"*1,22;2) the result is an approximative result rounded 2
``numbers after coma.
`

`I thing that 22% is a tax so it would be better to trunk the result in
``te result cell in that exemple the resutant errror would be 0,82 cents
``in place of 1,82 cents if you round each result.
`
I hope to be right with your question..

1,22
291,34 355,4348
291,34 355,4348
291,34 355,4348
109,29 133,334
1199,6382
291,34 "=round(A8*B1;2) 355,43
291,34 "=round(A9*B1;2) 355,43
291,34 "=round(A10*B1;2) 355,43
109,29 "=round(A11*B1;2) 133,33
"=SUM(C8:C11) 1199,62

Jacques CHAILLET
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### Context

**Re: [libreoffice-users] The way SUM works** · *CHAILLET Jacques*

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