Question

Out of a class 45 student five were absent 30%of the remaining had failed to do the homework. Find the number of students who did the homework.

Answer 1

total students =45-5=40

students who failed to
do homework =30 percent

students who did homework =70 percent

no. of students who did homework =
70/100 * 40= 28 students

Answer 2

total number of students = 45
number of students absent = 5
number of students present = 45-5
=40
number of student who did not do the homework = 30% of 40 = 30/100×40 = 12

number of student who did the homework = total number of students – Number students who did not do the homework
= 40-12 = 28

so, the number of students who did the homework is 28 students