Hello,
I use google translation to understand your problem ^^
For help you, we need to know your check_mk and grafana version.
Which database are you use ?
Influxdb ? PNPnagios ? Checkmk datasource ?
To have “mean” value you can select it like that, on legend values:
Then, with pie, you can have a thing like that:
As you can see, if I choise “last” instead of “mean”, I have the last value (100)
You have other option on “Transform” as “Add Field from calculation”
I hope I help you.
Regard.