Will give and brainliest (this is pretty easy). 20 points. click on link

The answer is:  "  " .
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Explanation:
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(1/6)  / (3/7 hr) =  x/ 1 hr ;

 → (1/6) / (3/7) = x ; 

↔  (1/6) / (3/7)  = x ; 

→  (1/6) * (7/3) = x ; 

The "3" cancels to a "1", and the "6" cancels to a "2" ; 
  
          →  { since:  " 6 ÷ 3 = 2" ; and since:  " 3 ÷ 3 = 1 "} ;
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→  And we can rewrite as:

→  (1/2) * (7/1) = (1 * 7) / (2 * 1)  = 7/2 ; 
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The answer is:  " " .
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Note:  The question asks, "At this rate, what "FRACTION" of the distance...?" ; 

→  As such, we leave the answer in the "fraction" form.
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The first option would be correct if it were one half and not one