Start by telling us why you're calling. 1  Here are some very popular reasons why other people call this Garmin number. 2  We have a few other tricks to try if you're calling Garmin, and if you are already viewing this on a phone or call-capable device, then you can click or tap below to just start a call.
Suppose you invest $100 at a compound interest rate of 10%. The rule of 72 tells you that your money will double every seven years, approximately: If you graph these points, you start to see the familiar compound interest curve:
It took more time for the same thing to happen to the bonds issued in 2003 because the interest rate was so low. One way to calculate this is to use the Rule of 72. This simple tool lets you calculate how long it would take to double your investment at a given rate of return.