Question

A total of 80 students passed in one class, all of them passed, if 80% of the students had failed, then how many students are in the class.

Answer 1

hope it helped!!........

Answer 2

let the number of students in a class be 100%.
passed students=80(20% of class).
failed students in percent=80%.
number of students in class=20÷100×80=400
hence,number of students in class =400 students