diff --git a/prometheus/values.yaml b/prometheus/values.yaml
index a27d41379..f7601e93e 100644
--- a/prometheus/values.yaml
+++ b/prometheus/values.yaml
@@ -1429,7 +1429,7 @@ conf:
               description: 'Pod {{$labels.pod}} in namespace {{$labels.namespace}} has a container terminated for more than 10 minutes'
               summary: 'Pod {{$labels.pod}} in namespace {{$labels.namespace}} in error status'
           - alert: volume_claim_capacity_high_utilization
-            expr: (kubelet_volume_stats_used_bytes / kubelet_volume_stats_capacity_bytes) > 80
+            expr: 100 * kubelet_volume_stats_used_bytes / kubelet_volume_stats_capacity_bytes > 80
             for: 5m
             labels:
               severity: page