Percentage of (sub)total

Thanks to this post I was able to find a solution to my topic.

This is the measure I am using now:

[Measures].[Transitions to status issues count]
/
DefaultContext(
([Measures].[Transitions to status],
[Time].CurrentHierarchyMember,
[Project].CurrentHierarchyMember,
[Issue Type].CurrentHierarchyMember)
)