The attendance at a seminar in year 1 was 500. In year two the attendance was changed by 100 what is the percent change in attendance?

.2%

.4%

20%

40%

The percentage change is 20%.

Step-by-step explanation:

Initial attendance was 500

Change in attendance is = 100

So, the changed attendance is either 400 or 600.

Percent change in attendance = 100 * (change in attendance/Initial Attendance)

= 100 * (1/5)

= 20%