We could use a logarithmic scale instead of percentages. If we defined a decibel scale for time then this would be a 2.83 dB change both ways (if we defined dB-

We could use a logarithmic scale instead of percentages. If we defined a decibel scale for time then this would be a 2.83 dB change both ways (if we defined dB-sec as 10*log10(time/(1 sec)) ).