Chart % works but graph isn't reflecting %

[DMCS]

The following code produces the right percentage but the graph isn't reflected - see the image

var chart = "<img src=\"https://chart.googleapis.com/chart?chs=350x100&chd=t:" + balance + "," + balance + "&cht=p3&chl=Balance (%) - "+ credit +"|Credit (%) - "+(100-credit)+"\">";

How should I construct the above code snippet to get the graph working?

Thanks!

[DMCS]

Got it fixed

[SJW]

For others stumbling across looking for solution, you can set the value and a display value:

{v: .75, f: '75 %'}