A decade ago, the average class size at Hillsboro Middle School was 20 students. Now it is 23 students. What is the percent of increase in the average class size?
To calculate the percent of increase in the average class size, we first need to find the difference between the current average class size and the previous average class size.
Difference = Current average class size - Previous average class size
Difference = 23 - 20
Difference = 3
Next, we need to calculate the percent of increase using the formula:
Percent Increase = (Difference / Previous average class size) * 100
Percent Increase = (3 / 20) * 100
Percent Increase = 0.15 * 100
Percent Increase = 15%
Therefore, the percent of increase in the average class size at Hillsboro Middle School is 15%.