A lot of people misinterpret what Racial Profiling is. In many cases it's not a question of policy or agreed practice, it's just the fact that there are, and always will be, people who, when seeing a group of white youths and a group of black youths, be looking more for criminal activity amongst one ethnic group. So the white youths may be doing something illegal, but the officer is so busy keeping an eye on the black youths he does not even see that they are doing so.
It's not a deliberate thing, it is slightly racist, but it is also human nature to be so. Screaming and shouting about it will worsen the situation, not improve it.
And saying it should be the same percentages as the city is a stupid thing to say, it doesn't take social/living conditions into account, or the class divide that inevitably grows. Even that, in a way, can be traced back to 'racial profiliing'.
Assuming that every white officer is looking for black criminals is also as much racial profiling as assuming all blacks are criminals in the first place.