Reporting Assistance - # of reqs active in certain time period

Summary

Trying to drive towards Filled %

Content

Good Morning!

 

I can use the help of some expert report builders or analytics gurus!  I'm stumped on a request to build a report that would drive us toward "% Reqs Filled" by recruiter for a certain time period (i.e. Monthly).

What I'm thinking is we need:
# Filled Reqs (in 1 month) / # of average active reqs in that same month

Any suggestions on how to pull this or tally up how many reqs I had active in any one time period?

Thanks!

Julie