Millburn High School does not officially give out class ranks, so you can't truly know if you're in the top 10% or whatever of your grade. That said, it's not too difficult to find this out based on some simple mathematics, although the answer may not be very accurate.
Before I show the proof itself, I want to tell you something: do NOT get caught up in this proof. I am a high schooler just like you, and I have no real mathematical background- I just really like making proofs as a fun pastime. Your worth as a student and human being is not calculatable as a single number. Colleges care about more than just your class rank, so don't get too depressed if you have a subpar class rank. It's just not fun to worry, and worrying about a problem is one of the best ways to avoid having it fixed- I would know. You are NOT your class rank. As Matthew McConaughey said in Interstellar,
It takes two numbers to measure your own ass, bu