You can double your savings every decade without doing anything. Sound too good to be true? Mathematically, it’s actually not! Today we discuss the Rule of 72, a mathematical shortcut to determine how long it takes to double an investment depending on a variable interest rate. We also introduce some basic ways of investing in indexes to take advantage of their long-term financial benefits while requiring nearly no effort on your part. Blog at thewealthyhealthy.co. Music by bensound.com.