In https://jira.camunda.com/browse/OPT-3787, the total instance count of combined process instance count reports is added to the evaluation response. We should use this value to display the relative percentages for each bar in the visualisation. This existed previously but was removed as they always showed 100%. See the linked ticket for the API change.

The design for displaying the relative %: https://app.zeplin.io/project/5b4f294ab0d5cf0c2c391d1d/screen/5ed61185c093fb3ef6021f66

ATs:

• We display the relative percentage of instance counts for each report within an evaluation of a combined process instance count report