Annie has 90/3=<<90/3=30>>30 cats.

Melanie has 30*2=<<30*2=60>>60 cats.

# Answer

60
Question:
Melanie has twice as many cats as Annie, and Annie has three times fewer cats than Jacob. If Jacob has 90 cats, how many cats does Melanie have?
Answer:
Let's think step by step.

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60
Melanie has twice as many cats as Annie, and Annie has three times fewer cats than Jacob. If Jacob has 90 cats, how many cats does Melanie have?
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