Set value inside doughnut chart in ionic 3

Ionic Framework ionic-v3
1

plz help im stack

showChart3() {
this.emptyspace = 100 - this.value
console.log(this.emptyspace,‘emptyspace’)
var charts = new Chart(document.getElementById(“doughnut-chart”), {
type: ‘doughnut’,
data: {

    datasets: [
      {
        label: "",
        backgroundColor: [
          "#CC0033", "#D98880"
        ],
        data: [this.value, this.emptyspace],
        hoverBackgroundColor: "#CC0033",

      }
    ],
    allLabelss: [{
      text: "This is chart title",
      align: "center",
      bold: true,
      y: 220
    }, {
      text: "Ans here's the subtitle as well",
      align: "center",
      bold: false,
      y: 250
    }],
 
  },
  options: {
    title: {
      display: true,
      text: 'water'
    }
  }
});

console.log(charts)
}