Question

Attendance at the new public school

has increased 15%. If the current
population is 359 students, how
many students were enrolled the year
before?​

edit: nvm got the answer

Answer 1

312 students

Explanation:

In this problem, we are told that the current population of students in the public school is

n = 359

We can call

`n_0` = the population of students the previous year

We know that the attendance has increased by 15% in the past year, so we can write

`n=n_0 + (15)/(100)n_0`

where 15/100 represents the percentage of 15%.

The expression can be rewritten as

`n=n_0 (1+0.15)`

And solving for n0, we find how many students were enrolled the year before:

`n_0 = (n)/(1+0.15)=(359)/(1.15)=312`