Please help

The number of potholes in any given 1 mile stretch of freeway pavement in Pennsylvania has a bell-shaped distribution. This distribution has a mean of 36 and a standard deviation of 9. Using the empirical (68-95-99.7) rule, what is the approximate percentage of 1-mile long roadways with potholes numbering between 9 and 54?

Answer = % . (Do not enter the percent symbol or round your answer. This asks for a percentage so do not convert to decimal. For example, for 99%, you would enter 99, not 0.99)