The Wall Street Journal reports that the current rate on 10-year Treasury bonds is 2.25 percent and the rate on 20-year Treasury bonds is 4.50 percent. Assume that the maturity risk premium is zero. Calculate the expected rate on a 10-year Treasury bond purchased ten years from today, E(10r10). (Do not round intermediate calculations. Round your final answer to 2 decimal places.) Expected rate _________%