What does a selection ratio of $\mathrm{.}90$ mean?

Question $11$ options:

It means $1$ percent of the applicants applying to the position will be hired.

It means $10$ percent of the applicants applying to the position will be hired.

It means $90$ percent of the applicants applying to the position will be hired.

It means $9$ percent of the applicants applying to the position will be hired.