I'm using the project example and looking at the page "Examples/Wpf/CartesianChart/Basic Bars/BasicColumn.xaml" we have this snippet that uses the LabelFormatter:
<lvc:Axis Title="Sold Apps" LabelFormatter="{Binding Formatter}"></lvc:Axis>

And in codeBehind the "Formatter" is created like this: Formatter = value => value.ToString("N");

So it's a double converted to string with decimals. However, when executing the chart, the label is formatted as follows " 50,00 0,000%", and where does this "0.000%" come from. 50 ToString("N") should just be "50.00"