diff --git a/app/controllers/external_users_controller.rb b/app/controllers/external_users_controller.rb
index 48293610..4ef53f6d 100644
--- a/app/controllers/external_users_controller.rb
+++ b/app/controllers/external_users_controller.rb
@@ -70,9 +70,9 @@ class ExternalUsersController < ApplicationController
     statistics = []
     tags = ProxyExercise.new().get_user_knowledge_and_max_knowledge(@user, @user.participations.uniq.compact)
     tags[:user_topic_knowledge].each_pair do |key, value|
-      statistics.append({:key => key.name.to_s, :value => (100.0 / tags[:max_topic_knowledge][key] * value).round(2)})
+      statistics.append({:key => key.name.to_s, :value => (100.0 / tags[:max_topic_knowledge][key] * value).round})
     end
-    statistics.sort_by! {|item| item[:value]}
+    statistics.sort_by! {|item| -item[:value]}
 
     respond_to do |format|
       format.json { render(json: statistics) }