http://cfmlblog.adamcameron.me/2013/12/help-me-with-some-code-if-you-have.html When in doubt, fall back to Java?

numbers.cfm

<cfscript>
testNumbers = [
	"0", "0.0", "0.00", "0.000", "0.001",
	"0.1", "0.10", "0.100", "0.101",
	"0.11", "0.110", "0.111"
];

expectedNumbers = [
	"0", "0", "0", "0", "0",
	"0.1", "0.1", "0.1", "0.1",
	"0.11", "0.11", "0.11"
];

function formatter(n){
  // http://docs.oracle.com/javase/7/docs/api/java/text/DecimalFormat.html
	var decimalFormatter = createObject("java", "java.text.DecimalFormat").init("0.##");
	decimalFormatter.setMaximumFractionDigits(2);
	var formattedN = decimalFormatter.format(javaCast("double", n));
	return formattedN;
}

for (i = 1; i <= arrayLen(testNumbers); i += 1){
	result = formatter(testNumbers[i]);
	expected = javaCast("string", "#expectedNumbers[i]#");
	color = expected.equals("#result#") ? "##090" : "##900";
	writeOutput("<span style='color:#color#'>#testNumbers[i]#: #result# (Expected: #expectedNumbers[i]#)</span><br>");
}
</cfscript>