void Main()
{
	var shares = GetNicePercentagesForShares(0.01, 2, 3, 4);
	var total = shares.Sum();
	foreach(var share in shares)
		Console.WriteLine($"{share}%");
	Console.WriteLine($"total: {total}%");
}

// 1%
// 22%
// 33%
// 44%
// total: 100%

public static List<double> GetNicePercentagesForShares(params double[] shares)
{
    var total = shares.Sum();
	if (total <= 0)
		return shares.Select(i => 0.0).ToList();
		
	var onePercent = 100.0 / total;
    var smallEnough = 0.0000001;

	var percentages = shares.Select(s => {
		var percentage = Math.Round(s * onePercent);
		if (s > smallEnough && percentage < 1)
            percentage = 1; // If there is a share display at least 1 percent 
		return percentage;
	}).ToList();
	
	var percentTotal = percentages.Sum();
	// correct the largest percentage
    if (Math.Abs(percentTotal - 100.0) > double.Epsilon) {
		int largestPercentageIndex = percentages.IndexOf(percentages.Max());
        percentages[largestPercentageIndex] = (100.0 - percentTotal);
	}		
    return percentages;
}