This guide will show you how to add Contacts to a Group within a Business Report. Firstly, go to the reports section on the left and you will see the report page. 

Step 1

Then via Reporting > Business Reports and click on the Name of your chosen Report

Step 2:

Click on the Add Linked Contacts to Group button

Step 3:

 You have the choice of adding either to a new group or an existing group - select whichever one is more appropriate.