Question

30% of the cars in a parking lot are green. If there 21 green cars, how many cars are parked in the parking lot?

Answer 1

70 cars

Explanation:

Let x cars are parked in the parking lot.

`30\% \: of \: x = 21 \\ \\ (30)/(100) * x = 21 \\ \\ x = 21 * (100)/(30) \\ \\ x = (2100)/(30) \\ \\ x = 70 \:`

70 cars are parked in the parking lot.