We need to find the percent increase from 2800 to 4600.
2800 ------> 4600
+?%
Well...
4600-2800 = $1800
So, the dealership profited $1800.
If we compare this with the initial price of the car...
1800/2800 = 64.3% increase from its initial price approx.
answer: 64.3% approx.