Edit field Declared real progress in Task

Hi, please help me how to edit value of Declared real progress in Task, namely:

  • Value default: 10% - 20% -…- 90% - 100%
  • My wishes: Start - Processing - Completed
    Because: I need when 100%=Completed, the Task will automatically switch to the Closed (if create new Attritubes, it won’t work like that).
    Thank all,