Calculate percentage with subsummaries

[JMBell]

Hello

I have a report that runs an aging report for our invoices. In the report it shows a current (less than 30 days), 30 days, 60 days and 90 days past due with each timeline totaled by a summary of the total due and then a trailing grand summary at the end. I need to display a percentage of the total due for each timeline, i.e. a calculation of the amount 30 days past due divided by the total grand summary of all * 100 to get the percentage of the total due for each. Is there a way to do this? Thanks in advance!

[comment]

Try a summary field defined as Fraction of Total of due amount.