You can use- to roughly estimate how many years a given sum of money must earn at a given

2) the Rule of72

Divide72 by the rate of interest and get the number of years.

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>>>>>>>>>>>> 2) the Rule of72

2) the Rule of72         ................

2) >>>>>>>>>>>>>>>the Rule of72

The 'Rule of72' is a simplified way to determine how long an investment will take to double, given a fixed annual rate of interest. By dividing72 by the annual rate of return, investors can get a rough estimate of how many years it will take for the initial investment to duplicate itself.

I agree, with the answer the Rule of72

Rule of72

 This is a rule stating that in order to find the number of years required to double your money at a given interest rate, you divide the compound return into 72. The result is the approximate number of years that it will take for your investment to double.