Desde Investopedia

TERM OF THE DAY

Rule Of 72 The rule of 72 is a shortcut to estimate the number of years required to double your money at a given annual rate of return. The rule states that you divide the rate, expressed as a percentage, into 72:  Years required to double investment = 72 ÷ compound annual interest rate Note that a compound annual return of 8% is plugged into this equation as 8, not 0.08, giving a result of 9 years (not 900).

Breaking it Down: The rule of 72 is a useful shortcut, since the equations related to compound interest are too... Read More