I am running CR 2011 and I created a report with a parameter date value. An user has to type in his specific date range before constructing a report. Now I would like to add a percent-change-view which shows the change rates during the last period.

For example:

User input date range:  10/10/2012 to 11/01/2012 (sum: 20 days)

 

Specific Values from 10/10/2012 to 11/01/2012

Percent Changes from  09/25/2012 to 11/09/2012  (sum: 20 days)

 

value   |   Change prior period

22        |           +0,5%

 

Does anyone has an idea how I can implement this?

Cheers and thanks in advance