Last September the sales total for a certain car dealership was 400% greater than the average monthly sales total for the other 11 months. The sales total for September was approximately what percent of the year´s sales?  Options:
A) 15 % B) 27% C) 31% D) 42% E) 75%
11 moth avg = x   11 month total = 11x   sept = 400% of x + x = 5x   sept/total = =5x/(11x+5x) = =31%   ANSWER:31%
<result>C</result>
Last September the sales total for a certain car dealership was 400% greater than the average monthly sales total for the other 11 months. The sales total for September was approximately what percent of the year´s sales?