Danny and Steve are running towards each other, each one from his own house. Danny can reach Steve's house in 27 minutes of running, which is half the time it takes Steve to reach Danny's house. If the two started to run at the same time, how much time longer will it take Steve to reach the halfway point between their houses than Danny to reach the halfway point between their houses?  Choose the correct answer.
A) 13.5 minutes B) 27 minutes C) 35 minutes D) 54 minutes E) 81 minutes
Danny's time is 27 minutes. The time to reach halfway is 13.5 minutes.   Steve's time is 54 minutes. The time to reach halfway is 27 minutes.   The time difference is   27 - 13.5= 
<gadget id="calculator">  27 - 13.5</gadget>
<output>13.5</output>
13.5 minutes   The answer is 13.5 minutes.
<result>A</result>
Danny and Steve are running towards each other, each one from his own house. Danny can reach Steve's house in 27 minutes of running, which is half the time it takes Steve to reach Danny's house. If the two started to run at the same time, how much time longer will it take Steve to reach the halfway point between their houses than Danny to reach the halfway point between their houses?