Nearly a tie: Brazil and Greenland differ by barely -75%% in area — about 8,499,400 km² km² against 2,154,754 km² km².
Brazil sits in South America, Greenland in North America. On the old Mercator map the latitude gap distorted how large each felt beside the other; at true size the answer is simply 0.3×.
The old map muddied it further: Mercator inflates Brazil about 1× and Greenland about 11.8×, so on a Mercator-style map this pair appears 2.9× apart instead of the true 0.3×.
Brazil fits 0× into Greenland.