Company A acquired 60% of the share of company B in December 2012, Joy is a accountant who work in Company A, He should take in preparing the consolidated financial statements for the newly established group, he is concerned about the calculation of Non-Controlling Interest share of equity, particularly in the years after acquisition date .
Prepare a report for Joy, explaining the step approach to the calculation of Non-Controlling Interest and the effects of the approach in the years after acquisition date.