Evaluate division for percent in goodreads' update box.

percent-eval.user.js

// ==UserScript==
// @name        Percent-eval
// @namespace   http://gkatsev.com/percenteval
// @description Evaluate division for percent in goodreads' update box
// @include *://*goodreads.*/*
// @version     1
// ==/UserScript==
window.addEventListener('DOMContentLoaded'
, function(){
    var inputs = document.querySelectorAll('#user_status_percent')
    console.log(inputs)
    Array.prototype.forEach.call(inputs, function(el){
      el.addEventListener('blur', function(ev){
        var value = el.value
        if(/\d+\/\d+/.test(value)){
          var newVal = Math.ceil(eval(value)*100)
          el.value=newVal
        }
      }, false) 
    })
  }
, false)