Display data labels on graph with percent sign

I have created a graph in Crystal XI based on percent of registrants based on region.  In the group footer of the report, I have created a summary on the registration count and clicked on the "show as a percentage of" in the options area of the summary.  My graph is using that number.  I am displaying the percentage as a data label on the graph.  When I try to format it as a percentage (to show the percent sign", it totally changes the number.  For example, 28% turns into 2,821%.  Also, the percentages are not rounding properly.  It only adds to 99% and not 100%.  Do you have a formula etc that can force it to add to 100%?

Thank you