In a certain parking lot, 5% of the cars are towed for parking illegally. However 80% of the cars which are parked illegally are not towed. What percentage of cars in the parking lot are parked illegally?  Choose the most appropriate option:  A) 20%  B) 25%  C) 30%  D) 35%  E) 40%
Let x be the number of cars and let y be the number of cars parked illegally.   5%*x = 20%*y   y/x = 1/4 = 25%   The answer is 25%.
<result>B</result>
In a certain parking lot, 5% of the cars are towed for parking illegally. However 80% of the cars which are parked illegally are not towed. What percentage of cars in the parking lot are parked illegally?