Comparing Non Cumulative Vs. Cumulative?

[#1]

Hi everyone -

I am trying to get a statistic that compares cumulative vs. non-cumulative data.

Essentially I would like:

Total # of Products Purchased this week

-----------------------------------------------------------

       Cumulative # of Customers

What is the best way to write an expression that accomplishes this?

Thanks for the help.

[Anonymous]

Hi,s

  Can you please provide test data.

Regards