def round_decimal_to_str(value , to=3):
	"""
        Utility method for rounding the decimal value to string to given digits
        @param value :  value to round 
        @param to    :  how many decimal points to round to
	"""
	rounded_value = '-'
	if value is None:
		return rounded_value
	rounded_value = str(round(float(value), to))
	return rounded_value