Morris.Donut({
  element: 'graph',
  data: [
    {value: 80, label: 'Canon mes'},
    {value: 10, label: 'Administración'},
    {value: 7, label: 'Acueducto'},
    {value: 3, label: 'Internet'}
  ],
  formatter: function (x) { return x + "%"}
}).on('click', function(i, row){
  console.log(i, row);
});