Chart labels with different format to Value label

When formatting a value on a chart to, for example, a percentage with 2 decimal places, the axis relating to the value will also show as 2 decimal places.  Having an axis with 10.00%, 20.00% etc does not look good.  There are scripts that can potentially overcome this, however they are as all such scripts unsupported and prone to break on upgrade.  This should be part of core functionality where the Designer is able to set a number format that precludes this from displaying.