In this video, we dive into understanding how to use your calculator for solving finance questions involving interest rates and compounding. We focus on concepts like quoted rates, effective annual rates (EAR), and different compounding methods (e.g., semi-annual, monthly, and quarterly). The video walks through practical examples, including how to solve for an equivalent interest rate when switching between compounding frequencies (e.g., semi-annual to monthly). Key concepts covered include APR, EPR, and EAR which are used to calculate the effective annual rate based on the quoted rate and compounding frequency. By using these formulas and your financial calculator, you will be able to solve questions related to different compounding periods, ensuring a solid grasp of how to handle interest rates on exams and in real-world applications. The video also emphasizes strategies for approaching exam questions, like focusing on the highest quoted rates and the number of compounding periods to determine the highest effective annual rate.