Better Tripadvisor: Precise ratings, website link, phone, google search (click Raw to install with e.g. Tampermonkey)

userscript-tripadvisor-precise-note.user.js

// ==UserScript==
// @name        Tripadvisor precise note
// @namespace   KrisWebDev
// @include     http://www.tripadvisor.fr/*
// @version     1
// @grant       none
// @require			http://code.jquery.com/jquery-2.1.4.min.js
// ==/UserScript==

this.$ = this.jQuery = jQuery.noConflict(true);

var coeff = 5;
var result = 0;
var sommeAvis = 0;
var nbAvis = 0;

$("span.compositeCount").each(function(index, val) {
   nbAvis = parseInt($(this).text());
   result += nbAvis*coeff--;
   sommeAvis +=  nbAvis;
});

result = (Math.round(result/sommeAvis*10))/10;

$("span.rate.sprite-rating_rr").after($("<span><b>"+result+"</b></<span>"));