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When applying a graduated style to a layer, the labels have an unnecessary level of precision. For instance a value of 200-400 would be labelled as 200.0000-400.0000. There doesn't seem to be an easy way to change this and it makes legends difficult to interpret for end users.

What this also raises is the instance of percentages where a decimal value between 0 and 1 would be styled but the legend wouldn't display as say '50%' rather than '0.5' without manually changing all the label values. This is very time consuming.

Is there a possibility of adding some sort of simplified number formatting options for labels which would allow conversion to percentage, precision of decimal values, formatting of negative numbers (ie brackets vs minus sign), commas in numbers etc.?