score:54

Accepted answer

scale title configuration is a header if you scroll down in the documentation.

here is a simple bar chart example, using scalelabel which is sligtly modified to illustrate a percentage.

https://jsfiddle.net/r71no58a/4/

scales: {
   yaxes: [{
       ticks: {
           min: 0,
           max: 100,
           callback: function(value) {
               return value + "%"
           }
       },
       scalelabel: {
           display: true,
           labelstring: "percentage"
       }
   }]
}

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