Performance Capacity calculation raw to final

I'm trying to work out how "current_utilization" in the -raw output from "statistics show -object resource_headroom_cpu -raw" correlates (ie. is calculated/converted) to main percentage output in "statistics show -object resource_headroom_cpu"

EXAMPLE:

cluster1::*> statistics show -object resource_headroom_cpu

Object: resource_headroom_cpu
Instance: CPU_cluster1-n1
Start-time: 11/9/2018 10:23:20
End-time: 11/9/2018 10:31:39
Elapsed-time: 498s
Scope: cluster1-n1

Counter Value
-------------------------------- --------------------------------
current_latency 330us
current_ops 4215
current_utilization 56%             <<<<<<<<<<<<<

...

cluster1::*> statistics show -object resource_headroom_cpu -raw

Object: resource_headroom_cpu
Instance: CPU_cluster1-n1
Start-time: 11/9/2018 10:27:43
End-time: 11/9/2018 10:27:43
Scope: cluster1-n1

Counter Value
-------------------------------- --------------------------------
current_latency 20267702036037us
current_ops 53787499981
current_utilization 36639819423391%                   <<<<<<  (how is this 56%?)

Similarly, how is -raw optimal_point_utilization converted to standard output?

EG.

statistics show -object resource_headroom_cpu:

optimal_point_utilization 88

statistics show -object resource_headroom_cpu -raw:

optimal_point_utilization 28078837