label = this.getPercentage(dataset, element, index) + '%';
var str = '\
<span class="customPercent">%</span>\
';
var divPercent = document.createElement('div');
divPercent.innerHTML = str;
label = this.getPercentage(dataset, element, index) + divPercent;
function getLabel() {
return `<span class='customPercents'>${this.getPercentage(dataset, element, index)}%</span>`;
}