Merge pull request #23220 from joshulyne/k8s-kpis-blogpost-edit

Fix promql for k8s kpis with kuberhealthy blog post

Author: k8s-ci-robot

content/en/blog/_posts/2020-05-29-K8s-KPIs-with-Kuberhealthy.md

@@ -175,7 +175,7 @@ We calculate this by measuring Kuberhealthy's [deployment check](https://github.
 
 - PromQL Query (Availability % over the past 30 days): 
   ```promql
-  1 - (sum(count_over_time(kuberhealthy_check{check="kuberhealthy/deployment", status="0"}[30d])) OR vector(0))/(sum(count_over_time(kuberhealthy_check{check="kuberhealthy/deployment", status="1"}[30d])) * 100)
+  1 - (sum(count_over_time(kuberhealthy_check{check="kuberhealthy/deployment", status="0"}[30d])) OR vector(0)) / sum(count_over_time(kuberhealthy_check{check="kuberhealthy/deployment", status="1"}[30d]))
   ```
 
 *Utilization*