Answer :

AL2006

With all due respect, I'm guessing that you're fine with the question,
but you could use some help on the answer.  Am I right ?

-- The answer has something to do with the total amount the coach spent,
so we'll need to know that amount.   Let's find it now:

(9 chickens) x ($5 each) = $45 for chicken
(15 burgers) x ($6 each) = $90 for burgers

Total amount he spent:  ($45 + $90) = $135 all together  ( nice coach ! )

What part of it was used for the chickens ?
Remember, he spent  $45  for chickens.

   $45 / $135  =  1/3  =  0.33333....  =   ( 33 and 1/3 ) percent

Now I'm wondering ... it doesn't say anywhere in the problem ...
do you think he gave any of that food to the team ?