Chart question...

[#1]

Another chart question I'm afraid (I will master these)

I've used the Straight Table chart option to create a chart which contains two dimensions... IndexDate and CallsReason.  The expressions are =sum(CallCounter) which gives me the number of calls and I'd like to include another which details the % of these calls.  Should I be creating a Calculated Dimension? The table below is similar to the one I've created.

Reason for CallReason 1

Header 1	Header 2	Header 3	Header 4
Call Logged date	No. of Calls	%
01/06/2015	2	0%
01/06/2015	Reason 2	11	0%
01/06/2015	Reason 3	8	0%
02/06/2015	Reason 1	10	0%
02/06/2015	Reason 2	5	0%

Thanks in advance

[ravindraa]

use below expression for % values

sum(callcounter)/sum(TOTAL callcounter).

now you can get % wise values.