$[$The following information applies to the questions displayed below.$]$

Fitness Fanatics is a regional chain of health clubs that evaluates its club managers based on return on investment $($ROI$).$ The company's Springfield Club reported the following results for the past year:

Sales $ $850,000$

Net operating income $ $25,500$

Average operating assets $ $100,000$

The following questions are to be considered independently.

$3.$ Assume the club manager can reduce expenses by $$3,400$ without any change in sales or average operating assets. What would be the club$$s return on investment $($ROI$)?$

Note: Do not round intermediate calculations. Round your answer to $2$ decimal places.