Report From SSAS With Two Different Date Column

Hi all,

I created a SSAS cube with the dimension "date" (including dates from 2006 to 2007) and "service numbers" (including service number where customer can call in) and a measure "number of calls".

The I created a report with the MDX builder showing a date as column (i.e. 02/01/2007), service numbers as rows and number of calls in the middle. Easy :-)

Now I will add a column with a date one year before (i.e. 02/01/2006) and a column showing the difference between the two dates as a percentage value.

How can I create this in the graphical builder?
Or do I have to create the MDX query manualy?

Thanks in advance!



some ASCII art:
2/1/07 2/1/06 diff.
-------------------------------------------------------------
service number 1 | 345 | 690 | 50%
service number 1 | 100 | 50 | 200%
...