Format cleanup policies cache hit ratio

app/workers/container_expiration_policies/cleanup_container_repository_worker.rb

@@ -159,7 +159,10 @@ module ContainerExpirationPolicies
 
       return unless tags_count && cached_tags_count && tags_count != 0
 
-      log_extra_metadata_on_done(:cleanup_tags_service_cache_hit_ratio, cached_tags_count / tags_count.to_f)
+      ratio = cached_tags_count / tags_count.to_f
+      ratio_as_percentage = (ratio * 100).round(2)
+
+      log_extra_metadata_on_done(:cleanup_tags_service_cache_hit_ratio, ratio_as_percentage)
     end
 
     def log_truncate(result)

spec/workers/container_expiration_policies/cleanup_container_repository_worker_spec.rb

@@ -82,8 +82,9 @@ RSpec.describe ContainerExpirationPolicies::CleanupContainerRepositoryWorker do
             nil | 10  | nil
             0   | 5   | nil
             10  | 0   | 0
-            10  | 5   | 0.5
-            3   | 10  | (10 / 3.to_f)
+            10  | 5   | 50.0
+            17  | 3   | 17.65
+            3   | 10  | 333.33
           end
 
           with_them do