Complex sentence: There is also a large presence of Asian Peruvians, primarily Japanese and Chinese, that constitutes less than 2% of the population, which in proportion to the overall population is the largest of any Latin American nation.
Split into simpler sentences: There is also a large presence of Asian Peruvians, primarily Japanese and Chinese. That population constitutes just under 2% of the total population, which in proportion to the overall population is the largest of any Latin American nation.