The census does not provide a breakdown of the population by race or ethnicity. However, a study conducted in 2001 by the Scottish Executive estimated that around 1.8% of the population of Scotland was from a black or minority ethnic background. If this percentage were applied to the population of Perth, it would suggest that there are approximately 810 people from a black or minority ethnic background living in the town.
It is important to note that these figures are estimates based on the 2011 census and the 2001 study, and the actual number of black people living in Perth may differ. Additionally, the term "black" is a broad category that encompasses a variety of ethnicities and backgrounds, and it is important to recognize the diversity within this group.