I am having trouble judging where I am going wrong with the following question
The price of lunch for 15 people was 207.00 including a 15% gratuity for service.What was the average price per person EXCLUDING the gratuity ? a)11.73 b)12.00 c)13.80 d)14.00 (Ans=12.00)
Here is how I am solving it
Without tip = 207-\frac{15}{207} = 175.93
Per Person = \frac{175.95}{15} = 11.73$
Why is my answer wrong ?