A plane left on time at noon on Monday. It arrived at its destination at 8:16 PM the same day, which was 16 minutes late. On average, how many seconds did the plane fall behind every fifteen minutes?

15%
20%
25%
80%
81%

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The plane ride was supposed to take 8 hours but it took an extra 16 minutes 
There are 4 fifteen minutes in a hour 
therefor 32 15 minutes in 8 hours 
The plane was 960 seconds late 
960/32 
Therefor your answer is 30 seconds 

Answer:80%



Step-by-step explanation:A plane left on time at noon on Monday. It arrived at its destination at 8:16 PM the same day, which was 16 minutes late. On average, how many seconds did the plane fall behind every fifteen minutes?