What percentage of your work day do you spend being productive?

I'd say with a given week, I only do 15 minutes of real, actual work

It depends on the day. From 10 to 80 percent. I'm a DBA, and can only do what's available.

If i have peace and quiet, 60-80%, depending on the day and project.

Recently? Working in the sane room with an infant and girlfriend, and getting asked for rides and random favors, chores, or being told random stories.... Goddamn 5-10%, 20% if I'm really really lucky. 😡😠