I need to know how many tasks are 100% complete in my project. How do I get a current total of the number of tasks that are 100% complete from my %Complete column?
Add a spare number field (Number1 for example) and customize the field with the following formula:
In the Custom fields dialog under "Calculation for task and group summary rows" select "Sum" in the Rollup drop down.
Turn on the Project Summary task to see a total count of complete tasks.