PrecisionTester, C#

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            double xcord = 1343444155.8478527;
            //double xcord = 1144155.8478527;
            double div1 = 211.66666666666666666666666666667; 
            double res1 = xcord / div1 * 100;
           
            int precision = 4;            
            for (int i = 0; i < 9; i++)
            {
            
                double div2 = Math.Round (div1, precision);
                double res2 = xcord / div2 * 100;

Console.WriteLine("precision = " + precision);
                Console.WriteLine(res1);
                Console.WriteLine(res2);   
                Console.WriteLine("diff = " + (res1 - res2));
                Console.WriteLine("------------");   
                
                precision = precision + 1;
            }
            
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,12 sec, absolute running time: 0,13 sec, cpu time: 0,08 sec, average memory usage: 18 Mb, average nr of threads: 3, absolute service time: 0,31 sec