Zip Company produces one product and is operating at full capacity. Following is data related to the single machine that is used to produce its one product. Actual run time this week Machine time available per week Actual run rate this week Ideal run rate Defect-free output this week Total output this week (including defects) 3,200 minutes 4,000 minutes 4.5 units per minute 5.0 units per minute 8,200 units 8,500 units Calculate the company's efficiency rate for the week. (state your answer as a percentage rounded to one decimal place)