What Is the Rule of 72 and How Can Investors Use It?

The Rule of 72 is an easy way to calculate how long it will take your investment to double in value. Here's how it works.
Investopedia

How Do I Use the Rule of 72 to Calculate Continuous Compounding?

Sean Ross is a strategic adviser at 1031x.com, Investopedia contributor, and the founder and manager of Free Lances Ltd. Anthony Battle is a CERTIFIED FINANCIAL PLANNER™ professional. He earned the ...
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The Rule of 78 for Loans: What It Is and How to Calculate It

The Rule of 78 can be used by lenders to calculate interest that could significantly impact how much you end up paying over the life of a loan. Unlike the standard amortization method, the Rule of 78 ...
AOL

The rule of 25 for retirement: What it means and how to calculate it

One of the biggest challenges of retirement planning is figuring out how much money you need. There are several ways to estimate it , including talking to a financial advisor or using a retirement ...