[Solved]-Displaying percentage in Y-axis of Highcharts column chart-Highcharts

Use this in plot options,

plotOptions: { column: { stacking:'percent', pointPadding: 0.2, borderWidth: 0 } },

what I did is:

yAxis: {min: 0, max:100,tickInterval: 25,
              title: {
                  text: "title"
              },
              labels: {
                  format: '{value}%',
              }
          }

You can use formatter http://api.highcharts.com/highcharts#yAxis.labels.formatter and add symbol to your label.

Here is what I did:

yAxis: {
  labels: {
    formatter: function() {
       return this.value+"%";
    }
  },
}

You could do this:

yAxis: {
  labels: {
    format: '{value}%'
  }
}