What are the numbers in the color chart?

Hello, guys.

Once we match the color chart in Davinci Resolve, the numbers (%) comes up under the each color square.
What are those? Do they indicate accuracy of color matching result? What % am I supposed to see for the good result?

They indicate the amount of change, but say nothing about the quality achieved.
Large changes might come from the cameras color ‘science’ or low color quality of the lights.
In your case the gamma of the source may not be defined correctly.

Did you actually get the automatic color checker to work? It is broken for me, V17.3.2.

viewtopic.php?f=21&t=148895&hilit=color

You will see the numbers shown below the chips are quite low, but the image is destroyed. So I abandoned trying to figure out the automatic tool and instead use hue-hue and Hue-sat curves