What ROI will you need to double your money in 12 years?
A. 7%
B. 6%
C. 5%
D. 9%
What ROI will you need to double your money in 12 years?
A. 7%
B. 6%
C. 5%
D. 9%
B 6%.
Using the Rule of 72, you divide 72 by the number of years. So, 72 / 12 = 6%.