Suppose you know that cumulative ination for the period 12/31/1972-12/31/1980 was 2.030. You also know that the geometric mean for Treasury bills for this period was 7.4 percent. What was the real return for Treasury bills for the period 12/31/1972-12/31/1980? Express your answer in percent but to the nearest tenth of a percent. Note that I have provided the percent sign; therefore, DO NOT type in the percent sign. For example, if the answer in percent equals 2.5% type in 2.5--not 0.025 and not 2.5%.