You have an opportunity to buy a perpetuity that pays $400 a year forever starting a year from now for $1,500. What interest rate makes this a fair price? Instruction: Round to three decimal places. E.g., if your answer is 0.0106465 or 1.06465%, you should type ONLY the number .011, neither 0.0106465,0.0106, nor 1.065 . Otherwise, Blackboard will treat it as a wrong