could you please how to get 16.6667 with the solution method?

The Fresh Connection is looking at the needs for a new processing operation. The demand at this operation is 368 units per day. Given the combination of regular time, overtime and some additional time available due to cross training, this operation is up and running for 16.5 hours per day across multiple shifts. Task Time Req. (min.) Predecessor Tasks 8.51 b 21.93 7.97 b b C 7.15 d e 6.27 d f 11.26 e g 19.14 f h 5.49 g Assume that each task must be completed in sequence but that you can combine some tasks so that the tasks can be completed on a total of six workstations without increasing the cycle time beyond what it would be if each task had its own work station. How much more efficient is the process compared to using eight workstations (stated as the difference between the two percents)? Efficiency = Output Total Task Time Input Number of Stations - Actual Cycle Time 66.67 16.6667 margin of error +/- 0.1