wikiHow Calculating Effective Interest Rate Answers 1. The effective annual interest rate is 2.02%. 2. The effective annual interest rate is 6.39%. 3. The effective annual interest rate is 8.3%. 4. The effective annual interest rate is 5.12%. 5. The effective annual interest rate is 4.55%. 6. The effective annual interest rate is 19.56%. 7. The present value of the annuity is $47,042.45. 8. The effective annual interest rate is 10.47%. 9. The effective annual interest rate is 12%. 10. The effective annual interest rate is 4.36%. 11. The effective annual interest rate is 3.04%. 12. The effective annual interest rate is 7.23%. 13. The effective annual interest rate is 6.72%. 14. The effective annual interest rate is 12.68%. 15. The effective annual interest rate is 8.13%. Page