Since 1 hour is 60 minutes, 20 minutes is 20/60=1/3 of an hour.

Eating 3 potatoes per 20 minutes is 3/(1/3)=<<3/(1/3)=9>>9 potatoes per hour.

At 9 potatoes per hour, it will take Jason 27/9=3 hours to eat all of the potatoes.

# Answer

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<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
If Jason eats three potatoes in 20 minutes, how long, in hours, would it take for him to eat all 27 potatoes cooked by his wife?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
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If Jason eats three potatoes in 20 minutes, how long, in hours, would it take for him to eat all 27 potatoes cooked by his wife?
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