Compound Interest

In this video, Lizzie explains the concept of compound interest, a key financial principle where interest is calculated on the initial principal and also on the accumulated interest from previous periods. She discusses how banks use interest for savings and loans, highlighting the difference between simple and compound interest. The video provides examples and practice problems to help viewers understand how to calculate compound interest using multipliers and powers. Viewers are encouraged to engage with the content by trying out problems and subscribing for more educational videos.

What is the primary way banks make money from interest?

• By not charging any interest on loans

• By charging lower interest rates on loans than they pay on savings

• By offering the same interest rates for loans and savings

• By charging higher interest rates on loans than they pay on savings

How is compound interest different from simple interest?

• Compound interest is added to the balance at the end of each compounding period

• Compound interest does not depend on the interest rate

• Compound interest is calculated only once at the end of the loan period

• Compound interest is always lower than simple interest

What is the multiplier used for a 2.5% annual compound interest over three years?

• 1.025 to the power of 2

• 1.025 to the power of 3

• 1.25 to the power of 2

• 1.25 to the power of 3

How do you calculate the monthly interest rate from an annual rate of 3.6%?

• Multiply by 3.6

• Divide by 12

• Divide by 3.6

• Multiply by 12

If a problem involves depreciation, what type of percentage change is it?

• Percentage multiplication

• Percentage decrease

• Percentage increase

• No change