How to calculate test metrics using JIRA and populate Confluence?

[lijuthomas]

We are looking to implement few JIRA defect/test execution metrics in Confluence. 
Few examples listed below:

(Defects Fixed / Defects Reported) * 100 

Sev. 1 (Critical + High) Defects/Total Defects reported

(No. Fail TC executed/ Total TC Executed) * 100

Is there a plugin which will calculate this for me in JIRA, that will help populate the same in Confluence?