What percentage of tax is levied on petrol in Australia?

In Australia, the tax structure on petrol includes both excise and goods and services tax (GST). The excise is a fixed amount per litre, which currently is around 42 cents per litre, and then the GST is added on top of that final price. Collectively, these taxes result in a considerable percentage of the price of petrol being made up of tax.

Given current figures, the total tax levied on petrol approximates to about 38% of the retail price when taking into account both the excise and the GST. Therefore, option C is correct as it accurately reflects the current percentage of tax imposed on petrol in Australia.

This understanding emphasizes the considerable impact that taxation can have on consumers, influencing not only the prices they pay at the pump but also contributing to government revenues.