How do I allow Reporters to edit the percent done for a ticket?
Subject is pretty much self explanatory.
My reporters have "Add notes" and "Edit notes".
Do they need another permission to set the percent done?
In "Administration->Roles and permissions->Permissions report" under "Issue Tracking" you might need to grant "Edit Issues" those needing to set the percentage done.
Editing an issue generally goes against the intent of the reporter role, but this may highlight a need of a new custom role with some permissions above and beyond the generic reporter role.