There are 516 cars in a parking lot. One-third are blue, one-half are red, and the rest are black. How many black cars are on the lot?
Let's think step by step below.
86
Blue = 516 * (1 / 3) = 172 cars.

Red = 516 * (1 / 2) = 258.

Black = 516 - (172 + 258) = 86.

There are 86 black cars on the lot.

.

The answer: 86