Which two civilizations controlled the greatest amount of land in 200 ce

The Roman Empire and the Han dynasty.

The Roman Empire was the period in the history of Ancient Rome that came after the Roman Republic. During this period, the city of Rome was the largest in the world and the empire included roughly 20% of the world's population at the time.The Han dynasty was the second imperial dynasty of China, preceded by the Qin dynasty and succeeded by the Three Kingdoms period. The Han period is considered a golden age of Chinese history.

Your answer is 2 because you do keep change flip when you divide fractions