Normalized fields are not acting like numerical fields?

Hello out there.

If I work with utilization data from Metricbeat, fields like system.cpu.total.pct are easy to create graphs with, can be used for statistical analysis, etc. However the normalized values like system.cpu.total.norm.pct don't behave like numerical fields. But they're just normalized numerically so what's the difference?

It would be preferable for us to use normalized values for what we are doing. Without the normalization I'll have to do more calculations which increases the complexity of my code.

Is there an explanation for this? I'd certainly appreciate some input and insight.

Thank you!