Answer:
21
Step-by-step explanation:
Let the total number of cars in the parking lot = x.
Since, it is given that 16% of the total cars are blue and there are total 4 blue cars.
So, we get,
16% of x = 4
i.e. 0.16x = 4
i.e. [tex]x=\frac{4}{0.16}[/tex]
i.e. [tex]x=\frac{400}{16}[/tex]
i.e. [tex]x=\frac{100}{4}[/tex]
i.e. x = 25
Thus, there are total 25 cars in the parking lot.
So, the number of non-blue cars = 25 -4 = 21.
Hence, there are 21 non-blue cars.