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Easy: Compounded yearly
With interest compounded n times a year, A = P(1 + r/n)^(nt), where P is the starting amount, r the yearly rate as a decimal and t the number of years. With continuous compounding, A = Pe^(rt). Write the percent as a decimal first, and round only at the end.
Find the balance. Round to the nearest cent.
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P is the starting amount, r the yearly rate as a decimal, n the number of times interest is compounded each year, and t the number of years.
It is the limit as interest is compounded more and more often, giving A = Peʳᵗ. It earns slightly more than monthly or daily compounding.
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