I got wrong for 1.66

Could you please help me? Thank you.

Panini, a popular sandwich shop, offers 3 types of sandwiches: grilled vegetables, grilled chicken, and pastrami. The table below provides demand data:

Grilled Vegetables Grilled Chicken Pastrami Demand per hour 25 15 10

There are up to five steps in the process of making sandwiches listed below with activity times. Only 50% of customers want their sandwich toasted, no matter which sandwich is ordered.

Step Grilled Vegetables (in minutes) Grilled Chicken (in minutes) Pastrami (in minutes) Cut bread 0.75 0.75 0.75 Grill 1.40 1.40 Slice meat 3.00 Toast 2.00 2.00 2.00 Wrap 0.50 0.50 0.50

Suppose Panini employs 1 worker at each step. What is the highest implied utilization of this process? (Round the answer to 3 decimal places.)