If you're going to lie, make sure the source you post at least supports part of your lie. Here's from your Wiki link:
Descendants of indigenous peoples, such as the Quechua and Aymara, or the Urarina[28] of Amazonia make up the majority of the population in Bolivia (56%) and, per some sources, in Peru (44%).[29][30] In Ecuador, Amerindians are a large minority that comprises two-fifths of the population. The white/European population is also a significant element in most other former Portuguese colonies.
South America is also home to one of the largest populations of Africans. This group is also significantly present in Guyana, Brazil, Colombia, Venezuela, Suriname, French Guiana, and Ecuador. Mestizos (mixed white and Amerindian) are the largest ethnic group in Paraguay, Venezuela, Colombia and Ecuador and the second group in Peru. East Indians form the largest ethnic group in Guyana. Brazil followed by Peru also have the largest Japanese, Korean and Chinese communities in South America.[31]
The demographics of Colombia include approximately 30% white and European descendants,[32] while in Peru, European descendants are the third group in importance (15%).[33] Compared to other South American countries, the people of European descent are more of a majority in Argentina,[34] Chile [35][36] and Uruguay,[35] and are about half of the population of Brazil.[37][38][39] In Venezuela, the majority claimed to be multiracial and white, 49.9% and 42.2% black or mestizo, respectively.[40]
Where did you get the 50% whites figure?