How do i tell what my gear ratio is?

To determine your gear ratio, you can divide the number of teeth on the driven gear (the larger gear) by the number of teeth on the driving gear (the smaller gear). For example, if the driven gear has 40 teeth and the driving gear has 10 teeth, the gear ratio would be 40:10, which simplifies to 4:1. You can also check the specifications of your bike or vehicle if available, as they often list the gear ratiOS in the manual or on the manufacturer's website.