わかる takes the が particle for what's known. You should use わかる instead of わかれる. わかれる usually means 分かれる. 一番部分 is not natural here, I don't know what you mean Go

わかる takes the が particle for what's known. You should use わかる instead of わかれる. わかれる usually means 分かれる. 一番部分 is not natural here, I don't know what you mean Good luck in your studies.