To calculate the GST component of a GST-inclusive fare, divide the total fare by 11. This is because GST-inclusive amounts include 10% GST (which is 1/11th of the total).
For example, if a fare is $55, the GST component is $55 ÷ 11 = $5.
Your Okly tax statements automatically show this breakdown for all your trips, so you don't need to calculate it manually for each fare when lodging your quarterly BAS with the ATO.