Acarpark can hold 100 vehicles. 4/5 for cars and the rest for vans. if the carpark has 60 cars and is 3/4 full, how many vans are in the carpark.

There is space for 80 cars and 20 vans
if the park is 3/4 full there must be 75 cars and vans
so 75 - 60 (the amount of cars there) = 15

There are 15 vans