Which PivotGrid property changes value from currency to percentage?

In the Report Designer I have created a report with a PivotGrid control.

After working through the PivotGrid Wizard the values are shown with currency symbols when Previewed.

I have tried changing the Field ‘ValueFormat’ - ‘FormatType’ from Default to Numeric.
But no change and I can’t find anywhere to set values as percentage.

Any Ideas…

Thank you in advance.

Regards

David