Finance Quick Answers
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What is compound interest?
Compound interest occurs when interest is earned on a
principal sum along with any accumulated interest on
that sum. In other words, you're earning interest on
interest. This principal helps your money grow. For
example, if you deposit $100 and the interest rate is 5%
each year. At the end of year one, you will have $105.
At the end of year two, the compound interest is
calculated by multiplying 5% by $105. At the end of year
two, you would have $110.25. At the end of each year,
interest is calculated on the amount in the account.
Check out "The
Miracle of Compound Interest" to see the difference
compound interest makes.
Dr. Joyce Cavanagh, Former Assistant Professor and State Specialist, Consumer and Family Economics
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Last update: Friday, July 25, 2008
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