Carmine's parents, not convinced of his need for a new car, produced the following statistics showing the ages of cars owned by students on the dean's list. Age of Car (years) 0 1 2 3 4 5 6 7 8 9 10 Number of Cars 0 2 5 5 5 10 15 20 20 20 40 They then claimed that if he kept his 6-year-old car for another year, the chances that someone on the dean's list has a car as old as his would be increased by x percent. Use a relative frequency distribution to find x. (Round your answer to two decimal places.)