Basic method for updating the progress rate 

Click % Done to open Edit mode. Then you can either click the up/down arrows or directly enter a value.

However you cannot edit the progress rate for:

• A project or version

• Issues in gray color

Auto-calculating parent issue progress rate 

You may want to synchronize the progress rate between parent and child issues. This would mean, for example, that when the progress rate of a child issue is 100%, the parent issue's progress rate will also be 100%. You can do this with Auto-calculate percent done.

The calculation of the progress rate is based on time spent and duration. For instance, if Issue A has a duration of one day with 100% done, and Issue B has a duration of two days of with 50% done, the total parent issue progress rate would be:

(100% * 1 day + 50% * 2 days) / (1 day + 2 days) = 66% (Decimals are rounded down)

As shown in the progress bar, the one day issue has 100% percent done with all work for the day completed. The two day issue has 50% done, with one day's work completed. Therefore, for the parent issue, two days out of three are completed, equating to 66% done.