In 1975, interest rates were 7.85% and the rate of inflation was 12.3% in the United States. What was the real interest rate in 1975? How would the purchasing power of your savings have changed over the year? (Note: Be careful not to round any intermediate steps less than six decimal places.) --- What was the real interest rate in 1975? Real rate of interest in 1975 was [ %. (Round to two decimal places.)