According to the rule of 72, a savings account with an interest rate of 12 percent will double in value in approximately:

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The rule of 72 is a simple way to estimate the number of years required to double the invested money at a given annual rate of return. By dividing 72 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. In this case, dividing 72 by 12 percent gives 6 years.

According to the Rule of 72, a Savings Account with an Interest