How can I put sign (%) on data in ChartJS? - vue.js

Question

I want to add the sign (%) next to the value. The problem is when I concatenate sign (%) the pie chart is not showing data: vm.distributed_per_day.map(item => (item.Amount / sum * 100).toFixed(2) + '%'). How can I add the sign (%) to my pie chart? Can somebody help me with my problem? Here's my code
retrieveDistributedPerDayByPie : function() {
var self = this;
var sum = 0;
axios.post(this.urlRoot + this.api + "retrieve_transaction_per_day.php")
.then(response => {
console.log(response);
vm.distributed_per_day = response.data
var ctxChart = self.$refs.myChart2.getContext('2d');
for(var i = 0; i < this.distributed_per_day.length; i++) {
sum += parseFloat(this.distributed_per_day[i].Amount);
}
var myChart2 = new Chart(ctxChart, {
type: 'pie',
data: {
labels: vm.distributed_per_day.map(item => item.Day),
datasets: [{
label: 'Total Amount',
data: vm.distributed_per_day.map(item => (item.Amount / sum * 100).toFixed(2) + '%'),
backgroundColor: this.poolColors(vm.distributed_per_day.length),
borderColor: '#eee',
borderWidth: 2
}]
},
reponsive : true,
options: {
title : {
display : true,
text : "Distributed Reports per Day",
fontFamily: "sans-serif",
fontSize: 18,
},
legend: {
display: false
},
tooltips: {
enabled: true
}
}
});
}).catch(e => {
console.log(e)
});
},

Answer 1

This works on a bar chart, haven't tried it on a pie chart. Hope it works for you.
yAxes: [
{
ticks: {
callback: function (value, index, values) {
return value + " %";
}
}
}
]

Answer 2

This solution worked for me.
tooltips: {
mode: 'label',
callbacks: {
label: function (tooltipItem, data) {
var indice = tooltipItem.index;
return data.labels[indice] + ': ' + data.datasets[0].data[indice] + '%';
}
}
}