how to get tax amount from grand total?

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hi all , i have grand total and tax amount in %. now i want to show the tax value in number using C#.

i am getting small errors in getting actual values.

here is my code .

C#

decimal GrandTotal = 240.35;
decimal Taxfactor  =15 ; 

decimal taxamount= grandtotal - ((grandtotal * taxfactor)/100);

but taxamount
value gives me 36.0525 and actual tax amount should be 31.35.

coz what real data is subtotal = 209 plus tax 15% which gives 240.35.

i know it is because i calculate tax percentage on grandtotal but i dont know where i should modified.

Posted 24-Feb-14 20:07pm

ravikhoda

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User 59241 · Accepted Answer · 2014-02-24T20:39:00

Solution 2

Total = nett * ((100 + rate) / 100);
Tax = Total * (rate / (100 + rate));

Posted 24-Feb-14 20:39pm

User 59241

Updated 24-Feb-14 20:46pm

v3

Comments

ravikhoda 25-Feb-14 2:47am

i do not have the net amount with me that 's why i can't use this code.

[no name] 25-Feb-14 2:49am

The second line is your answer nothing to do with nett.

ravikhoda 25-Feb-14 3:31am

there is no rule that a team leader can not ask a question or he can no be wrong. its ok if you are not satisfied with my ans or whatever but you should respect other people when you answer about their questions...

[no name] 25-Feb-14 3:40am

You had posted and accepted a wrong answer to your own question. Even after correction it still is not an efficient way of doing it. I took the trouble to provide you with a correct answer. You told me mine was unusable. I never criticise anyone for being wrong.

ravikhoda 25-Feb-14 3:50am

anyways thanks for your help.

ravikhoda · Accepted Answer · 2014-02-24T20:27:00

Solution 1

ok i have solve this my self

here is the code.

C#

decimal GrandTotal = 240.35;
decimal Taxfactor  =15 ; 
 
decimal taxamount=grandtotal - ((grandtotal *100)/100+Taxfactor  );

Posted 24-Feb-14 20:27pm

ravikhoda

Updated 24-Feb-14 20:46pm

v2

Comments

[no name] 25-Feb-14 2:42am

Not correct. Gives the nett.

ravikhoda 25-Feb-14 2:47am

yes i modified my answer a bit, this will give me what i looking for.