Denmark is about 50 times smaller than Greenland.

Greenland is approximately 2,166,086 sq km, while Denmark is approximately 43,094 sq km, making Denmark 1.99% the size of Greenland. Meanwhile, the population of Greenland is ~56,831 people (6.0 million more people live in Denmark).
Tip: This to-scale comparison of Greenland vs. Denmark uses the Mercator projection, which distorts the size of regions near the poles.
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