app/assets/javascripts/index.js
$(function(){
var $ppc = $('.progress-pie-chart'),
percent = parseInt($ppc.data('percent')),
deg = 360*percent/100;
if (percent >= 50 && percent < 81) {
$ppc.addClass('gt-50');
$ppc.find('span').addClass('gp-50');
}
else if (percent > 81) {
$ppc.addClass('gt-80');
$ppc.find('span').addClass('gp-80');
}
$('.ppc-progress-fill').css('transform','rotate('+ deg +'deg)');
$('.ppc-percents span').html(percent+'% Complete');
});