Replace String for SO question

CSharp · Console

/Program.cs

using System;
using System.Text.RegularExpressions;

public class Program
{
	public static void Main()
	{
		var instr = "<td style=\"width:23.0769230769231%;\">";
		var pat = "<td style=\"width:\\d+\\.?\\d*%;\">";
		Console.WriteLine(Regex.Replace(instr, pat, "<br>"));
	}
}