The supermarket has 36 empty aisles and 12 aisles with shoppers. What percentage of the aisles in the supermarket are empty?

Step-by-step explanation:

One way to do this would be to find the circumference of the entire circle and divide it by 4, considering that the arc measure is 90 degrees

The radius is 1, and the circumference can be found by taking

So, the circumference of this circle is

Now, all we have to do is divide that by four to get our answer