The percentage bar is a great way to inform yourself (as well as others) of the progress of each task. It's also helpful in determining if a task is near completion or not.
To Edit the Percentage:
1. Tap on your chosen task to open the task details.
2. Once there, you will see a progress bar. Simply move the progress slider along the bar to set the percentage of the task that has been completed.
3. If the task is complete, simply tap the TICK button at the end of the bar to automatically slide it to 100%.
Completed tasks will appear in the 'Completed' view in the Task Board header bar. You are able to alter the status of a completed task at anytime. Changing the status of a completed task will automatically move it back into its original task board and category.