For its three investment centers, Sheffield Company accumulates the following data: The centers expect the following changes in the next year; (1) increase sales 20%; (11) decrease costs $352,000; (111) decrease average operating assets $495,000. Compute the expected retum on imvestment (ROI) for each center. Assume center I has a controllable margin percentage of 70%. (Round ROI to 1 decimal place, es. 1.5\%)