Is there a way to report percentage completion against a custom field in JIRA issues

Hi,

I am trying to create a report where I can show the progress percentage of completion against a custom field in JIRA.

There is an inbuilt report: Single Level Group By Report, however it only shows the bar (not the percentage), and there is no way to hide jira issues. 

Example:

- I have a custom field "Category" with values abc, xyz, etc.
- I would like to know the percentage completion group by this category field, such as abc is 50% complete, xyz is 20% complete. And this completion depends on closing the jira issues tied to this category.

Please guide.

Thanks,
Karan