Troubles calculating sum for decimals

atisz

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Hi everybody,

I have to calculate somme totals for decimal numbers, and... I can't make it to work.
I have a report:

Quantity Unit_price Price_without_Taxes Taxes Price
2 1,62 3,24 0,62 3,86
2 2,13 4,26 0,81 5,07
TI: 8,91

TI it's the sum of Price, and here is the problem, because the value of TI should be 8,93 Euro (3,86+5,07) not 8,91. In this case it's a loss of 3 cent , but in other cases, if i have more value to calculate the sum for I can loss a few euro!

The values are placed in the detail section, TI on the footer section of the report. To calculate TI I used a Text box wich format is currency, Decimal places 2, Control source =Sum([Price]).

I make this same calculations on forms also, there the situation it's worst, the value it's rounding down or up in each case, in this particular case insted of 8,93 I got 8,00.

What's wrong with it? I'm making mistakes somwhere?
Any help is apreciated. I need it soooooo bedly! :)

Thanx,
Attila
 
Formatting the field to 2 decimals does not round the data, it just rounds the display. You need to use the round() function to actually round the calculations so that the precision matches the display.
 
Some more info please...

Thanx for the tip! But unfortunatelly I'm not that good in VBA , so any further help it's grately apreciated.

Thanx in advanced
Attila
 
atisz said:
The values are placed in the detail section, TI on the footer section of the report. To calculate TI I used a Text box wich format is currency, Decimal places 2, Control source =Sum([Price]).
Make this
Code:
Control source =Sum(round([Price],2))
Use round() like this every place you do the calculations and your problems should go away.
 
Thanx!

Thanx for your quick help! I'm going to test it after the weekend, but i'm sure it's right what I need.

Attila
 
Not working

neileg said:
Make this
Code:
Control source =Sum(round([Price],2))
Use round() like this every place you do the calculations and your problems should go away.


I tried the code, but it's giving me an error message. It's telling me that there is a missing operand or operator .......... If I use the round() function simply, without the 2 decimals criteria, it's working, but that's not the way I want it to work.
What could be the problem?

Attila
 
It should work.

Round [Price] in the underlyinmg query, then.
 
I don't know what to do. I tried for million times the formula in reports, in queryes, but still don't work. I'm very sad. It's really important for me! Help please!!!!!!!!!!!!!!!!!!!!!

Thanx, Attila
 
In the query on which you have based your report add a calculated field like this:
Code:
 RoundPrice:Round([Price],2)
In your report, use RoundPrice instead of Price so that your total will become
Code:
= Sum([RoundPrice])
If you have based the report on the tables instead of a query, you have just discovered why it is always preferable to use a query.
 
Sample

Oh, God! I tried again, same error message! I post a sample of my db, maybe you will succede doing what I couldn't so far.
When you will open the report, you will be promted to enter the client ID, wich in this case is GA63, as shown in the box.
I'm very courios about it.

Thank you very much
Attila
 

Attachments

Change the calculated fields in your query TotalPeCod to
Pret: round([CT]*[pret_lunar],2)
Tva: round([pret]*19/100,2)

You'll find that this solves all your rounding errors in the report.
 
I did it!!!!!!!!

Thank you very, very....very much Neileg for helping me on this.Thanks to you now its rounding the value the way I want.
However, something its strange about this formulas. Why? Every time I used the formula right the way you told me, but it didn't worked. Sudanly I remembered that I was looking once for a formula in the MS Access Help, I found the formula, but it didn't worked till I changed a , with ;
So I changed your formula
Pret: round([CT]*[pret_lunar],2)
to
Pret: round([CT]*[pret_lunar];2)
and this way I solved the problem.
I don't know why its happening this. Any idea?

Thanxs again, Neileg, I appreciate your effort on helping me.
Attila
 
Your regional settings are just different to ours that's all.
Some use , as the separator, others ;
just use ; instead of the comma
 
For future reference, you might want to read the article titled "When Access Math doesn't Add UP" available on the www.fmsinc.com site. It explains the problem with double precision numbers. Basically it is better to use the currency data type when you don't need more than 4 decimal places of precision for your calculations. This is actually an integer data type that is scaled so it is not subject to floating point rounding issues.
 
Thanx to everyone for sharing with me this informations.
I use this forum from almost half year, and I found here more help than I ever dreamed of. Thank you guys!

Attila
 

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