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Understanding the Rule of 70? ›
The rule of 70 is used to determine the number of years it takes for a variable to double by dividing the number 70 by the variable's growth rate. The rule of 70 is generally used to determine how long it would take for an investment to double given the annual rate of return.
What is the math behind rule of 70? ›The Rule of 70 Formula
Hence, the doubling time is simply 70 divided by the constant annual growth rate. For instance, consider a quantity that grows consistently at 5% annually. According to the Rule of 70, it will take 14 years (70/5) for the quantity to double.
In the rule of 70, the “70” represents the dividend or the divisible number in the formula. Divide your growth rate by 70 to determine the amount of time it will take for your investment to double. For example, if your mutual fund has a three percent growth rate, divide 70 by three.
How do you use the 70 rule? ›Put simply, the 70 percent rule states that you shouldn't buy a distressed property for more than 70 percent of the home's after-repair value (ARV) — in other words, how much the house will likely sell for once fixed — minus the cost of repairs.
What does the rule of 70 show us? ›What's the “rule of 70?” The rule of 70 is an easy method of estimating how quickly a variable will double if you know its annual growth rate. If a variable is growing at a rate of x% per period, you simply take 70 and divide it by x. The rule of 70 is useful for all sorts of applications.
What is the rule of 70 simple definition? ›The rule of 70 is used to determine the number of years it takes for a variable to double by dividing the number 70 by the variable's growth rate. The rule of 70 is generally used to determine how long it would take for an investment to double given the annual rate of return.
What is the rule of 70 so useful? ›The Rule of 70 is a calculation that determines how many years it takes for an investment to double in value based on a constant rate of return. Investors use this metric to evaluate various investments, including mutual fund returns and the growth rate for a retirement portfolio.