Holding Period Return

SS13 Reading 40 Question 11 The 6-month holding period return is 1.067616 % the question asks for the annualized return. The answer is 2.130% What are the calcs to get no rounding at the 3rd decimal place? I get 2.135% I have not found calcs for Annualizing returns based on partial years. On performance attribution the readings recommend against it.