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 50 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 most appropriate option
A) 30 %
B) 40 %
C) 50 %
D) 60 %
E) 65 %
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">20 / (1/2)</gadget>
<output>40</output>

<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 50 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?
divide(20, subtract(const_1, divide(50, const_100)))
"let t be the total number of passengers . let x be the number of people with round trip tickets . 0.2 t had round trip tickets and took their cars . 0.5 x had round trip tickets and took their cars . 0.5 x = 0.2 t x = 0.4 t the answer is b ."