Question 191951
Initial  ratio = 4/5 or 8/10 or 16/20 or 32 /40  etc

taking  away  6  cars  from  each  of  above  ratios

4/5  -6  not  possible

8/10 - 6  =  2/10  =1/5  not  desired  ratio

16/20  -6 =  10/20  =1/2  desired  ratio

therefore  initially  16  cars,  and  20  SUV's  in  lot