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Percentage changes are meaningless if either of the numbers (before or after the change) is negative.

This is because the calculated percentage change from -56 to 16 is the same as the percentage change from +56 to -16 - even though in the first case the amount is increasing and in the second it is decreasing.

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โˆ™ 2012-12-07 16:30:17
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Q: What is the percentage increase from -56 to 16?
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