how to compare 2 years with crystal repor

[pacha(Legacy Member)]

who can you help me?

what might be the best and most easiest way building up a report with crystal reports 7.0 to compare 2 anual total turnovers. up to now i have always used the "select-button" to determine the concrete period. but in this case there is no direct comparisn and no delta and/or %-performance.

i would be so greatful!