The following bar graph shows the recruitment of employees in different years of a particular department.

Year	No. of Employees
2015	1200
2016	600
2017	500
2018	1000
2019	1400
2020	700

Question: The percentage increase in the recruitment of employees from 2017 to 2018 is:

The correct option is 100%.

To find the percentage increase in the recruitment of employees from 2017 to 2018, we can follow these steps:

Step 1: Identify the number of employees in both years from the given table.
According to the table:
- Number of employees recruited in 2017 = 500
- Number of employees recruited in 2018 = 1000

Step 2: Calculate the absolute increase in recruitment.
The increase in the number of employees is the difference between the recruitment in 2018 and 2017:
$\text{Increase}=1000-500=500$

Step 3: Calculate the percentage increase.
The percentage increase is calculated with respect to the initial year (2017) using the formula:
$\text{Percentage Increase}=\left(\frac{\text{Increase}}{\text{Recruitment in 2017}}\right)\times 100$

Substituting the values into the formula:
$\text{Percentage Increase}=\left(\frac{500}{500}\right)\times 100$

$\text{Percentage Increase}=1\times 100=100\%$

Therefore, the percentage increase in the recruitment of employees from 2017 to 2018 is 100%.