EXHIBIT 11 SCIENTIFIC-ATLANTA, INC., AND SUBSIDIARIES COMPUTATION OF EARNINGS PER SHARE (IN THOUSANDS, EXCEPT PER SHARE DATA) (UNAUDITED) THREE MONTHS ENDED THREE MONTHS ENDED JANUARY 1, 1999 DECEMBER 26, 1997 ------------------------------ --------------------------- PER SHARE PER SHARE EARNINGS SHARES AMOUNT EARNINGS SHARES AMOUNT --------- ------ --------- -------- ------ --------- BASIC EARNINGS PER COMMON SHARE Earnings from continuing operations available to common stockholders $ 19,188 75,274 $ 0.25 $ 14,832 78,885 $ 0.19 EFFECT OF DILUTIVE SECURITIES Options -- 757 -- -- 1,264 -- ------ ------ ------ ------ ------ ------ DILUTED EARNINGS PER COMMON SHARE Earnings from continuing operations available to common stockholders and assumed conversions $ 19,188 76,031 $ 0.25 $ 14,832 80,149 $ 0.19 ====== ====== ====== ====== ====== ====== SIX MONTHS ENDED SIX MONTHS ENDED JANUARY 1, 1999 DECEMBER 26, 1997 ------------------------------ --------------------------- PER SHARE PER SHARE EARNINGS SHARES AMOUNT EARNINGS SHARES AMOUNT --------- ------ --------- -------- ------ --------- BASIC EARNINGS PER COMMON SHARE Earnings from continuing operations available to common stockholders $ 34,182 77,245 $ 0.44 $ 31,317 78,567 $ 0.40 EFFECT OF DILUTIVE SECURITIES Options -- 1,095 -- -- 1,471 -- ------ ------ ------ ------ ------ ------ DILUTED EARNINGS PER COMMON SHARE Earnings from continuing operations available to common stockholders and assumed conversions $ 34,182 78,340 $ 0.44 $ 31,317 80,038 $ 0.40 ====== ====== ====== ====== ====== ====== The following information pertains to options to purchase shares of common stock which were not included in the computation of Diluted Earnings per Common Share because the options' exercise price was greater than the average market price of the common shares: January 1, 1999 December 26, 1997 --------------- ----------------- Number of options outstanding 4,944 3,341 Weighted average exercise price $22.473 $22.371 13 of 14