If car covers 102 km in 6.8 litres of petrol, how much distance will it cover in 24.2 litres of pretrol

First you want to find the ratio of liters of petrol to km. So you divide 102 by 6.8

then you get 15 km for every liter of petrol. Then you multiply 24.2 X 15 = 363 km which should be your answer