17306 fix vlan group utilization

netbox/ipam/querysets.py

@@ -64,7 +64,7 @@ class VLANGroupQuerySet(RestrictedQuerySet):
 
         return self.annotate(
             vlan_count=count_related(VLAN, 'group'),
-            utilization=Round(F('vlan_count') * 100 / F('_total_vlan_ids'), 2)
+            utilization=Round(F('vlan_count') * 100.0 / F('_total_vlan_ids'), 2)
         )