diff --git a/app/models/conference.rb b/app/models/conference.rb
index 38e2976e..e7a0790c 100644
--- a/app/models/conference.rb
+++ b/app/models/conference.rb
@@ -705,9 +705,9 @@ class Conference < ActiveRecord::Base
   # Returns the progress of the set up conference list in percent
   #
   # ====Returns
-  # * +Fixnum+ -> Progress in Percent
+  # * +String+ -> Progress in Percent
   def calculate_setup_progress(result)
-    (result.select { |_k, v| v }.length / result.length.to_f * 100).round(0).to_s
+    (100 * result.values.count(true) / result.values.count).to_s
   end
 
   ##
diff --git a/spec/models/conference_spec.rb b/spec/models/conference_spec.rb
index b1f6f419..581a3b5f 100755
--- a/spec/models/conference_spec.rb
+++ b/spec/models/conference_spec.rb
@@ -994,7 +994,7 @@ describe Conference do
       subject.splashpage = create(:splashpage, public: false)
 
       @result_false['registration'] = true
-      @result_false['process'] = 13.to_s
+      @result_false['process'] = 12.to_s
 
       expect(subject.get_status).to eq(@result_false)
     end
@@ -1033,7 +1033,7 @@ describe Conference do
       @result_false['cfp'] = true
       @result_false['registration'] = true
       @result_false['venue'] = true
-      @result_false['process'] = 38.to_s
+      @result_false['process'] = 37.to_s
 
       expect(subject.get_status).to eq(@result_false)
     end
@@ -1076,7 +1076,7 @@ describe Conference do
       @result_false['venue'] = true
       @result_false['rooms'] = true
       @result_false['tracks'] = true
-      @result_false['process'] = 63.to_s
+      @result_false['process'] = 62.to_s
 
       expect(subject.get_status).to eq(@result_false)
     end