When carla looked out at the school parking lot she notice that for every 2 minivans there were5 other types of vehicles if there are 161 in the parking lot how many of them are not minivans

The ratio of minivans to other vehicles is 2:5.

Since there's 161 total vehicles, the ratio actually has a constant, k.

In reality, the unsimplified ratio is 2k:5k

In ratios, you'll get the total if you add both the numerator and denominator.

So:

2k + 5k = 161

7k = 161

k = 23

5 * 23 = 115

115 vehicles are not minivans.

Good luck!