If the current exchange rate is $1.75/, the 1-year forward exchange rate is $1.55/, and the interest rate on British government bills is 8% per year. What risk-free dollar-denominated return can be locked in by investing in the British bills? (Round your answer to 2 decimal places. Do not round intermediate calculations. Omit the "%" sign in your response.)

Risk-free dollar-denominated return = ?%