Donna Clark made an investment of $ 27,381.96. From this investment, she will receive $3,600 annually for the next 15 years starting one year from now. Click here to view the factor table. For calculation purposes, use 5 decimal places as displayed in the factor table provided.) What rate of interest will Donna's investment be earning for her? (Hint: Use Table 4.) (Round answer to 0 decimal places, e.g. 25%.) Rate of interest 7 %