Question

what will be the answer

Answer 1

The attendance of last year is 700. So now it is increased by 15%.  So the attendance of this year is  = {(700×15/100)+700} = (105+700) = 805.

Answer 2

Attendance last year = 700
Attendance increased by = 15%
Total attendance increased =
$15 \div 100 \times 700$
=105
Total attendance = 700 + 105 = 805