Approximately what interest rate is needed to double an investment over four years?
A) 4 percent
B) 18 percent
C) 25 percent
D) 100 percent

Question

Quizplus · Accepted Answer

To double an investment in four years, you would need an interest rate that roughly follows the Rule of 72, which states that dividing 72 by the number of years you want to double your investment gives you the approximate interest rate needed. So, 72 divided by 4 equals 18 percent.

Approximately What Interest Rate Is Needed to Double an Investment