Title on Drilldown tab

I have a report that has the following healthcare data

PodCode

Total Admins

Total Scan

Total Manual

The user wants it grouped by Percentage of Scan (Total Admins/Total Scan) in descending order. This has been done (by making a formula that does the division and converts to string, e.g.87.2%)

It has another group beneath. The user is asking that when the report renders and the user drills down, that the Podcode appears on the drilldown tab tab instead of the Percentage of Scan String.

Is this possible? If so, how?

Thanks,

Dick