How the count of Open/Closed Tasks or Open/Closed Sub Cases.

I have two requirements,

1. "2 of 3 Tasks Closed"

2. "3 of 4 Sub Cases Closed"

I assume I need to do some kind of roll up field, but I have had no luck even getting the total count, then to format it as I showed above I want would need a custom field that concatenates the data in with the metrics? Here is what I tried to to get the total count, it has not calculated right but I am not sure if I need the hierarchy field to do it right?