The petrol tank at the local service station has a capacity of 6000L. It is 66.06 percent full. How many litres of petrol are needed?

Since the tank is 66.06% full, it is (100 - 66.06) = 33.94% empty.

Its capacity is 6,000L. So, in order to fill it to capacity, the service station

must order 33.94% of 6,000L.

33.94% = 0.3394

"of" means "times"

0.3394 x 6,000L = 2,036.4 liters needed, to fill the tank to the rim.