how to count linked issue and update to custom field?

[jun lee]

I want to count linked issue and update the value to a custom field A and count closed linked issue and update the value to a custom field B. 

Then, calculate B/A * 100 and update value to a custom field C.

Any one can show the script code?

[John Funk]

Hi Jun,

You should be able to do that pretty easily if you have the Automation for Jira app (or ScriptRunner although I do not use that one).