Solving for Interest Rate per Period

Scarlett has $27,500 available today to invest for 20 years. Scarlett desires an investment fund balance of $100,000 at that time. What interest rate (compounded annually) must Scarlett earn to reach the desired balance in 20 years?

• Round the percentage point to two decimal points (for example, enter 60.42 for 60.42444%).

Please tell me how to use Excel and financial calculator to get the answer. Thank you very much.