treasury bills are currently paying 4.6 percent and the inflation rate is 1.9 percent. what is the approximate real rate of interest? (do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) what is the exact real rate? (do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)