How To Say, "How Much Percentage~?"

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Sep 3, 2012 21:35
Don’t be mad if I post more than three entries in a single day!
I couldn’t get to sleep well last night and I was thinking about many things about English and so on.
I’d like to solve the questions which came up at that time one by one.

How much percentage could one hide keys of their houses under flower pots or door mats in front of their houses?

How much percentage could one find keys of other people’s houses under flower pots or door mats in front of their houses?

First of all, I don’t know which is right, “How much percentage” or “How many percentage” in that sentence.
Second, I don’t know which sounds more natural, “How many people” or “How much/many percentage.”
Third, I don’t know which sentence sounds more natural, the first one or the second one.
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