@prompt or User response

Hello All,

I have an object/db object "Status Percent". Now i need to display in my report 2 other objects "Current Status Percent" and "Previous Status Percent"
where....
Current Status Percent = Status of the year_month that was selected on the prompt page for current Quarter(Status of 201406 )

Previous Status Percent = Status of the year_month that was selected -3 months

SQL  ,  year_month user prompt/input

Current status: select status_percent where year_month = @userresponse(201406)

Previous status : select status_percent where year_month = @userresponse(201406) - 3 months

how should i be accomplishing this?

any inputs highly appreciated.

Thanks