Kilometres per litre = km/L. This is actually a formula hidden in the wording you can use to solve the problem. Km/L means kilometres divided by litres. From this, you might realize that the “per” in the sentence just means “divided by” in these cases! The answer would be 48 km / 6 L. To get litres per one kilometre, flip these numbers around. You will get 6 L / 48 km. Those are your answers