Question

out of 80 students in a class 16 were absent what percentage of students was present

Answer 1

No. of student present =80-16
= 64
present percentage =no. of students present÷total strength×100


= 64÷80×100
= 80 %

Answer 2

out of 80 - 16 were absent

80-16 = 64 present

out of 80 - 64 were present

out of 100 -  x

x = \frac{100*64}{80} \\

x= 80

80% were present