Final answer:
The Inuit are the largest group of Aboriginal peoples in the Northwest Territories and especially in Nunavut, where they make up about 85 percent of the population.
Step-by-step explanation:
The group of Aboriginal peoples with the largest population in the Northwest Territories and Nunavut is the Inuit. In the Northwest Territories, First Nations people compose just over half of the population, although the total number of residents there is relatively small. Nunavut, on the other hand, has a population of approximately 35,000, with about 85 percent being Inuit. The Inuit reside in 53 communities across northern Canada and speak Inuktut. This significant Inuit population reflects the historical and cultural makeup of the northernmost regions of Canada.