answer: 11 vehicles
work: okay, well, to solve this we need to find out how much more 4/9 is than 1/3. if you convert 1/3 so it has the same denominator as 4/9, you get 3/9.
and 4/9 - 3/9 = 1/9, so best value autos will have 1/9 more sales.
if the total sales are 99, and best value autos sells 1/9 more, multiply 99 by 1/9.
99 x 1/9 = 11
so, best value cars sells 11 more than clearance cars.