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.

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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 by Enabling the “Calculate Parent percent done from Children” option in the issue setting in the gantt configuration.

Refer Gantt issue settings | Calculate Parent percent done from Children for more detail.

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The calculation of the progress rate is based on time spent and duration. For example

• Issue A has a duration of 1 day with 100% done

• Issue B has a duration of 2 days with 50% done

The total progress rate of parent issue would be:

There is a special case.

• The progress rate of the parent ticket is calculated as 100%

• However, there is a child ticket with a blank duration and progress rate < 100%

In this scenario, the parent's progress rate will be adjusted to 99%