The percentiles of a standerized test?

Question

In a test like, the olsats for example, is it possible to score in the 100th percentile? Or is 99.9 the highest? And are the percentiles with the whole nation, state, or school? I just found out in the 3rd grade I got a 99.9 and am a little confused.

Answer 1

No, you can't be in the 100th percentile; 99.9 is the highest that you can go.