A worker is typically scheduled to operate 2 machines at his workstation for 10 hours per day, 4 days per week. During every 10 hours of scheduled work, the worker takes a 1-hour break. He also must...

A worker is typically scheduled to operate 2 machines at his workstation for 10 hours per day, 4 days per week. During every 10 hours of scheduled work, the worker takes a 1-hour break.  He also must perform 30 minutes of maintenance on each machine (separately) during every 10 hours of scheduled work.  The worker can’t process work while he is performing maintenance.

Workstation utilization = _______ %.