For this chain-of-thought reasoning and answer, what was the question?
Half the pet - owners have a cat because 1 - 1 / 2 = 1 / 2. There are 60 pet owners because 30 / (1 / 2) = 60. The town has 100 citizens because 60 / .6 = 100.
 A: 100

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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Q: In a town where 60% of the citizens own a pet, half own a dog and 30 own a cat. How many citizens are in the town?