A company has a policy of retiring company cars.This policy looks at a number of miles driven, purpose of trips, style of car, and other features. The distribution of the number of months in service...

A company has a policy of retiring company cars.This policy looks at a number of miles driven, purpose of trips, style of car, and other features.  The distribution of the number of months in service for the fleet of cars is bell-shaped and has a mean of 53 months and a standard deviation of 8 months.  Using the 68-95-99.7 rule, what is the approximate percentage of cars that remain in service between 61 and 69 months?

________% (Round your answer to the nearest tenth of a percent)