# Complicated math problem for other purposes?

ok this is for a novel..

say there are 7 billion people on earth and 'something' like a sickness happens and then there are only 2 billion left on earth. what percent would be left on earth and what percent would have died? also, 1 in how many people would die?

say there are 7 billion people on earth and 'something' like a sickness happens and then there are only 2 billion left on earth. what percent would be left on earth and what percent would have died? also, 1 in how many people would die?

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