ScriptRunner / JMCF - Show Progress % For Tickets Completed Under an Epic

[Ricky Wang Lin]

I've browsed around on this topic and it seems like there isn't a built-in solution in Jira yet so I want to ask here.

If I have an Epic with 10 tickets linked to it (Issues In Epic), I would like to be able to see how many of those 10 tickets are considered completed (when a Resolution is filled) in a % format on Issue View.  For example, if I have 3 tickets with a Resolution and 7 without, I'd expect to see something like 30% complete or 3/10 complete.

I understand that Advanced Roadmap has these Progress fields, but they're not usable at all in a regular Jira view.

Any thoughts on this are appreciated.  Thank you

Edit:  Wanted to share a KB I found on this topic: https://amoeboids.atlassian.net/wiki/spaces/UP/pages/549093616/How+does+the+progress+calculation+of+Jira+issues+and+epics+works#Progress-calculation-when-Jira-epic-is-key-result

The want here is to be able to show it on a ticket view/gadget for easy-to-read reporting.