I've got 8.5, but anything I can do should still be possible in Crystal 10.
It depends on how many types of FieldAdjuster. If it is only 3 or 4, do a running total for each. In the report footer, separately calculate a percentage for each. Allow for zero results.
If it is a lot, you could group by FieldAdjuster. Calculate a total for each group against a summary total for the report. If this gets in the way of other stuff you need to report, put this function into a subreport in the report header or report footer.
Madawc Williams (East Anglia)