27.  EARNINGS PER SHARE EPS was calculated as follows: According to the Interpretation 97-169 issued by ARDF in May 2008, Chunghwa presumed that the employees bonuses to  be paid will be settled in shares and takes those shares into consideration when calculating the weighted average number of  outstanding shares used in the calculation of diluted EPS if the shares have a dilutive effect for the years ended December  31, 2009, 2010 and 2011. The number of shares is calculated by dividing the amount of bonuses by the closing price of the  Chunghwa’s shares as of the balance sheet date. The dilutive effect of the shares needs to be considered until the stockholders  resolve the number of shares to be distributed to employees in their meeting in the following year. The diluted earnings per share for the years ended December 31, 2009, 2010 and 2011 were also due to the effect of potential  common stock of stock options issued by SENAO. PART III Amount (Numerator) Weighted- average Number of  Earnings Per Share (NT$) Income  Before Income Tax Net Income Common Shares  (Thousand)  (Denominator) Income  Before  Income Tax Net Income NT$ NT$ (In Millions) Year ended December 31, 2009 Basic EPS Income attributable to stockholders of the parent $  56,163 $  43,757 9,696,808 $  5.79 $  4.51 Effect of dilutive potential common stock SENAO’s stock options  (7) (7) ─ Employee bonus ─ ─ 28,806 Diluted EPS Income attributable to stockholders of the parent  (including effect of dilutive potential common  stock) $  56,156 $  43,750 9,725,614 $  5.77 $  4.50 Year ended December 31, 2010 Basic EPS Income attributable to stockholders of the parent $  56,438 $  47,609 9,696,808 $  5.82 $  4.91 Effect of dilutive potential common stock SENAO’s stock options  (7) (7) ─ Employee bonus ─ ─ 28,653 Diluted EPS Income attributable to stockholders of the parent  (including effect of dilutive potential common  stock) $  56,431 $  47,602 9,725,461 $  5.80 $  4.89 Year ended December 31, 2011 Basic EPS Income attributable to stockholders of the parent $55,379 $  47,068 7,789,326 $  7.11 $  6.04 Effect of dilutive potential common stock SENAO’s stock options  (9) (9) ─ Employee bonus ─ ─ 21,279 Diluted EPS Income attributable to stockholders of the parent  (including effect of dilutive potential common  stock) $  55,370 $  47,059 7,810,605 $  7.09 $  6.03 F-45