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The slope of the Fahrenheit scale matches that of the Rankine scale.

I would still say that the in the Rankine scale percentage increases make sense, and Fahrenheit changes to not.

The thing that matters isn't the slope, but the zero point; "X% farther from absolute zero" is a useful measurement, "X% farther from an arbitrary zero point" is not. Especially when negative or zero temperatures are involved.




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