I first learned about the rule 72 was during a financial literacy seminar in one of the insurance companies here in cebu. I can't help but wonder how was this discovered thus i endeavored to get the bottom of this. Hmmmm besides this is in a way a blog with the Rule of 72 as the primary theme then it would just be fitting to check out how this was derived

Let’s start with Php 1 since it’s naturaly easy to work with.

Assuming we have Php 1 and a yearly interest rate (R). After one year we have:
1 * (1+R)
where R is the interest per year