Let x be the number of miles Carrie is trying to run by the end of the month.
So, she has run (55/100)*x = 11 miles.
Therefore, (55/100)*x = 11.
Thus, x = 11*(100/55) = <<11*(100/55)=20>>20 miles. Answer: \boxed{20}.
Carrie is trying to run a certain number of miles by the end of the month. If Carrie is 55% of the way to achieving her goal and she has already run 11 miles, how many miles is she trying to run by the end of the month?
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