Your folks just called and would like some advice from you. An insurance agent just called them and offered them the opportunity to purchase an annuity for $20 comma 387.97 that will pay them $3 comma 000 per year for 25 years. They don't have the slightest idea what return they would be making on their investment of $20 comma 387.97. What rate of return would they be earning? The annual rate of return your folks would be earning on their investment is nothing%. (Round to two decimal places.)