Let, the number of students at Nick's school on last year be x.
Given, 98% of x is the number of students in this year.
Also given, there are 1170 students in the school this year.
First we will find 98% of x.
98% of x =
= 
So, we can write the equation as,

To solve it for x, first we will move 100 to the other side by multiplying 100 to both sides, we will get,



To get x, we will move 98 to the right side by dividing it to both sides. We will get,


(Approximately taken to the nearest whole number)
We have got the required answer.
The number of students were there in the school last year is 1,194.