You've observed the following returns on Crash-n-Burn Computer's stoc over the past five years: 7 percent, 13 percent, 21 percent, 32 percent, and 20 percent. Suppose the average inflation rate over this period was 3.9 percent and the average T-bill rate over the period was 3.7 percent. What was the average real return on Crash-n-Burn's stock? (Enter your answer as a percentage, omit the "\%" sign in your response, and round your answer to 2 decimal places. For example, 0.12345 or 12.345% should be entered as 12.35)