Exhibit 11 SCIENTIFIC-ATLANTA, INC., AND SUBSIDIARIES COMPUTATION OF EARNINGS PER SHARE (IN THOUSANDS, EXCEPT SHARE DATA) (UNAUDITED) THREE MONTHS ENDED THREE MONTHS ENDED DECEMBER 26, 1997 DECEMBER 27, 1996 ------------------------------ ------------------------------- PER SHARE PER SHARE EARNINGS SHARES AMOUNT EARNINGS SHARES AMOUNT ------- ------ --------- ------- ------ --------- BASIC EARNINGS PER COMMON SHARE Earnings from continuing operations available to common stockholders $14,832 78,885 $0.19 $13,752 77,205 $0.18 EFFECT OF DILUTIVE SECURITIES Options -- 1,264 -- -- 1,182 -- ------- ------ ----- ------- ------ ----- DILUTED EARNINGS PER COMMON SHARE Earnings from continuing operations available to common stockholders and assumed conversions $14,832 80,149 $0.19 $13,752 78,387 $0.18 ======= ====== ===== ======= ====== ===== SIX MONTHS ENDED SIX MONTHS ENDED DECEMBER 26, 1997 DECEMBER 27, 1996 ------------------------------ ------------------------------- PER SHARE PER SHARE EARNINGS SHARES AMOUNT EARNINGS SHARES AMOUNT ------- ------ --------- ------- ------ --------- BASIC EARNINGS PER COMMON SHARE Earnings from continuing operations available to common stockholders $31,317 78,567 $0.40 $24,562 77,166 $0.32 EFFECT OF DILUTIVE SECURITIES Options -- 1,471 -- -- 1,083 -- ------- ------ ----- ------- ------ ----- DILUTED EARNINGS PER COMMON SHARE Earnings from continuing operations available to common stockholders and assumed conversions $31,317 80,038 $0.40 $24,562 78,249 $0.32 ======= ====== ===== ======= ====== ===== 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: December 26, 1997 December 27, 1996 ----------------- ----------------- Number of options outstanding 3,341 2,926 Weighted average exercise price $22.371 $20.545