Question

In a certain school, 40% of all students are 8 years old or younger. The number of the remaining students is 120. How many students are 8 years old or younger?

Answer 1

What percentage of the students are > 8?

Answer 2

It's just like, what is the 40% of 120. Equation is Y=P% * X where:

Y=value
P%=40%
X=120

*(percentage of all students who are 8 years old or younger)40%--> 40/100(to convert percentage to decimal)= 0.4
*120 (remaining students)

*120*0.4=48

So there are 48 students who are 8 years old or younger.

I hope it helps.

Answer 3

let the no. of students are ;
x- 8 years old
y- more than 8
z- less than 8

then
60/100*(x+y+z)=120
so, x+y+z=200
now,
(x+z)/(x+y+z)*100=40
so x+z=80

so, 80 students are 8 years or younger.