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Rule of 72 (Seventy-two)
Rule of 72
Image 1 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.
Image 2 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.


Compounding

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