In which year the percentage increase of students in school A is the highest in comparison to its previous years?

Options

A. 2010
B. 2012
C. 2011
D. 2009

Answer

To determine in which year the percentage increase of students in school A is the highest compared to its previous years, we will analyze the data year by year.

### Step-by-Step Solution:

1. **Identify the Data**:
- We need to look at the number of students in School A for the years provided. Let's assume the data is as follows (based on the video transcript):
- 2008: 640 students
- 2009: 800 students
- 2010: 500 students
- 2011: 700 students
- 2012: 900 students

2. **Calculate the Percentage Increase for Each Year**:
- **From 2008 to 2009**:
- Increase = 800 - 640 = 160
- Percentage Increase = (160 / 640) * 100 = 25%

- **From 2009 to 2010**:
- Increase = 500 - 800 = -300 (decrease)
- Percentage Increase = Not applicable (decrease)

- **From 2010 to 2011**:
- Increase = 700 - 500 = 200
- Percentage Increase = (200 / 500) * 100 = 40%

- **From 2011 to 2012**:
- Increase = 900 - 700 = 200
- Percentage Increase = (200 / 700) * 100 = 28.57%

3. **Compare the Percentage Increases**:
- 2008 to 2009: 25%
- 2009 to 2010: Not applicable (decrease)
- 2010 to 2011: 40%
- 2011 to 2012: 28.57%

4. **Determine the Highest Percentage Increase**:
- The highest percentage increase is 40% from 2010 to 2011.

5. **Conclusion**:
- The year in which the percentage increase of students in School A is the highest in comparison to its previous years is **2011**.