Parking lots have signs that tell how occupied the lots are. When 90% of the spaces are occupied, a red light will go on.

Question

Parking lots have signs that tell how occupied the lots are. When 90% of the spaces are occupied, a red light will go on. Below are situations for two of the lots:

a)     Parking lot A: # of spaces: 200, occupied 183, 90% light on or off?

b)     Parking lot B: # of spaces: 300, occupied 255, 90% light on or off?

Question A. Which parking lot is more occupied?

Question B. For each parking lot, figure out whether the red light is on or off. Explain how you got your answer.

Answer 1

a) on .9(200)= 180<183

b) off .9(300) = 270>255