| Rule
of 72 |
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A rule stating that to find the number of years required to double
your money at a given interest rate, divide the compound return into
72. The result is the approximate number of years that it will take
for your investment to double.
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For
example, if you want to know how long it will take to double your
money at 12 percent interest, divide 12 into 72 and you get 6 years.
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