On a certain transatlantic crossing, 20 percent of a ship’s passengers held round-trip tickets and also took their cars abroad the ship. If 20 percent of the passengers with round-trip tickets did not take their cars abroad the ship, what percent of the ship’s passengers held round-trip tickets?  Choose the correct choice from the following choices.
A) 20%  B) 25%  C) 30%  D) 35%  E) 40%
Let T be the total number of passengers.   Let x be the number of people with round trip tickets.   0.2T had round trip tickets and took their cars.   0.8x had round trip tickets and took their cars.   0.8x = 0.2T   x = 0.25T   The answer is 25%.
<result>B</result>
On a certain transatlantic crossing, 20 percent of a ship’s passengers held round-trip tickets and also took their cars abroad the ship. If 20 percent of the passengers with round-trip tickets did not take their cars abroad the ship, what percent of the ship’s passengers held round-trip tickets?