For its three investment centers, Blue Spruce Company accumulates the following data: The company expects the following changes for investment centers I, II, and III in the next year: investment center I to increase sales 15%, investment center II to decrease controllable fixed costs $328,000, and investment center III to decrease average operating assets $328,000. Compute the expected return on investment (ROI) for each center. Assume investment center I has a contribution margin percentage of 68%. (Round ROI to 1 decimal place, e.g. 1.5\%.)