Hello.
Created a project in Task Weight % Complete Method. Added a task and gave 1 weight and set 6% percentage completed . I got the 6% complete status as expected. However I delete the task and refreshed the screen, but it still shows 6% completed in list view and detailed view even though there is no tasks. Screenshots attached.
list view
detailed view
However, when you add again a task then the % is reset to 0%.