Answer: (B) 80 percent
Attendance % = (Net Attendance ÷ Total Population) × 100 = (800 ÷ 1000) × 100 = 80%
The formula for attendance percentage is: (Net Attendance / Total Population) × 100. For the 14–15 age group, Net Attendance = 800 and Total Population = 1000, giving 80%. Students must apply this formula using only the row for the relevant age group, not the total row.