Can I copy a field value from sub-task to the parent issue

[Jon]

What is the best way to do this? I have automation lite for jira. What rules/items would I use to set this up so that automatically created sub tasks and future subtasks would have these fields populated with the data in the fields from the parent issue? 

[Petter Gonçalves]

Hello Jon,

You can use the following rule to copy your sub-task fields to the parent: 

P.S: Note that I used the summary field as an example.