Youve observed the following returns on Barnett Corporations stock over the past five years: 27.6 percent, 15.4 percent, 33.8 percent, 3.2 percent, and 22.2 percent. The average inflation rate over this period was 3.32 percent and the average T-bill rate over the period was 4.3 percent. What was the average real risk-free rate over this time period? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Average real risk-free rate %