diff --git a/plugins/mezuro/lib/mezuro_plugin/helpers/content_viewer_helper.rb b/plugins/mezuro/lib/mezuro_plugin/helpers/content_viewer_helper.rb
index ce403f6..c8cc63d 100644
--- a/plugins/mezuro/lib/mezuro_plugin/helpers/content_viewer_helper.rb
+++ b/plugins/mezuro/lib/mezuro_plugin/helpers/content_viewer_helper.rb
@@ -1,5 +1,5 @@
 class MezuroPlugin::Helpers::ContentViewerHelper
   def self.format_grade(grade)
-    grade.slice(/[0-9]+\.[0-9]{1,2}/)
+    sprintf("%.2f", grade.to_f)
   end
 end
diff --git a/plugins/mezuro/test/unit/mezuro_plugin/helpers/content_viewer_helper_test.rb b/plugins/mezuro/test/unit/mezuro_plugin/helpers/content_viewer_helper_test.rb
new file mode 100644
index 0000000..a11b4c0
--- /dev/null
+++ b/plugins/mezuro/test/unit/mezuro_plugin/helpers/content_viewer_helper_test.rb
@@ -0,0 +1,10 @@
+require "test_helper"
+
+class ContentViewerHelperTest < ActiveSupport::TestCase
+
+  should 'get the number rounded by two decimal points' do
+    assert_equal '4.22', MezuroPlugin::Helpers::ContentViewerHelper.format_grade('4.22344')
+    assert_equal '4.10', MezuroPlugin::Helpers::ContentViewerHelper.format_grade('4.1')
+    assert_equal '4.00', MezuroPlugin::Helpers::ContentViewerHelper.format_grade('4')
+  end
+end
diff --git a/plugins/mezuro/views/content_viewer/_module_result.rhtml b/plugins/mezuro/views/content_viewer/_module_result.rhtml
index 3bb1dd8..f007a0d 100644
--- a/plugins/mezuro/views/content_viewer/_module_result.rhtml
+++ b/plugins/mezuro/views/content_viewer/_module_result.rhtml
@@ -1,5 +1,3 @@
-<% require "#{RAILS_ROOT}/plugins/mezuro/lib/mezuro_plugin/helpers/content_viewer_helper.rb" %>
-
 <% the_module = module_result.module %>
 <% module_label = "#{the_module.name} (#{the_module.granularity})" %>
 
@@ -47,4 +45,3 @@
     </tr>
   </tfoot>
 </table>
-
--
libgit2 0.21.2