Delaware is about 74 times smaller than Montana.

Montana is approximately 376,979 sq km, while Delaware is approximately 5,060 sq km, making Delaware 1.34% the size of Montana. Meanwhile, the population of Montana is ~989,415 people (91,481 fewer people live in Delaware).
Tip: This to-scale comparison of Montana vs. Delaware uses the Mercator projection, which distorts the size of regions near the poles.