<ul class=contribute-list>

app/controllers/quality_analysis_controller.rb

@@ -250,7 +250,7 @@ class QualityAnalysisController < ApplicationController
           changes = author_info.changes.to_i
           user_issues = open(@sonar_address + "/api/issues/search?projectKeys=#{@resource_id}&authors=#{email}&resolved=false").read
           issue_count = JSON.parse(user_issues)["total"].to_i
-          ratio = (changes == 0 ? 0 : issue_count%changes)
+          ratio = (changes == 0 ? 0 : format("%0.4f",issue_count.to_f/changes.to_f))
           @user_quality_infos << {:email => email, :changes => changes, :issue_count => issue_count, :ratio => ratio}
         end
 

app/views/quality_analysis/_show.html.erb

@@ -140,6 +140,7 @@
 
       <% @user_quality_infos.each do |author_info| %>
           <% user = get_user_by_mail(author_info[:email]) %>
+          <% unless author_info[:changes] == 0 %>
               <ul class="contribute-list">
                 <li class="fl fontGrey2 contribute-list-avatar contribute-list-height">
                   <div class="mt8">
@@ -153,6 +154,7 @@
                 <div class="cl"></div>
               </ul>
           <% end %>
+      <% end %>
 
     </div>
 <% end  %>