Racism can be looked at in two distinct ways.
If you approach it as it relates to how the government protects the races, then the US is substantially ahead of almost any other country.
If, however, you approach it from the personal attitudes citizens of a country hold about the races, then the dynamic changes in such a way as no reasonably accurate measurement can be taken.
For purposes of this argument let us assume that I am racist. In describing myself as such, I could be merely describing an attitude that I feel a race is different from my own in any number of ways. I could believe, for instance, that a race does not do as well as mine in a particular field or activity. Or that my race does not measure up to another. This is racism, but not racist.
If, on the other hand, I were to believe that my race is superior in all ways and that the other races, or a race should be treated differently due to that superiority, then I would truly be a racist.
The US and UK have changed the meaning of the word in such a manner that one feels compelled to act and speak always, and firstly, determining how to preface their acts or remarks with some prepositional act or phrase indicating that the following is not racial and should not be taken as such. This is unfortunate and unavoidable in the realm of our political and personal discourse.