Go to Reports, and generate needed report (I take it as you did this already, right)?
If so, then on the bottom right corner of the report (if on Mac), you will see Save Report button. Click on it, and from the proposed options choose Print.
Alternatively you can Export report to PDF, then open PDF and print it as well.
Can you please tell me if you're doing this on a Mac or a Windows PC? Windows cannot yet export to PDF - only CSV.