Exhibit 11 SCIENTIFIC-ATLANTA, INC., AND SUBSIDIARIES COMPUTATION OF EARNINGS PER SHARE (IN THOUSANDS, EXCEPT PER SHARE DATA) (UNAUDITED) Three Months Ended Nine Months Ended ---------------------- ---------------------- March 28, March 29, March 28, March 29, 1997 1996 1997 1996 ---------- ---------- ---------- ---------- WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING 77,345 76,464 77,226 76,621 Add - Additional shares of common stock assumed issued upon exercise of options using the "treasury stock" method as it applies to the computation of primary earnings per share 914 -- 719 -- ------- ------ --------- --------- NUMBER OF COMMON AND COMMON EQUIVALENT SHARES OUTSTANDING 78,259 76,464 77,945 76,621 Add - Additional shares of common stock assumed issued upon exercise of options using the "treasury stock" method as it applies to the computation of fully diluted earnings per share -- -- 183 -- ------- ------ --------- --------- NUMBER OF SHARES OUTSTANDING ASSUMING FULL DILUTION 78,259 76,464 78,128 76,621 ======= ====== ========= ========= NET EARNINGS (LOSS) FOR PRIMARY AND FULLY DILUTED COMPUTATION Continuing Operations $ 16,461 $ 11,525 $ 41,023 $ 22,212 Discontinued Operations -- -- 3,400 (13,210) ------- ------ --------- --------- Net Earnings $ 16,461 $ 11,525 $ 44,423 $ 9,002 ======= ====== ========= ========= EARNINGS (LOSS) PER COMMON SHARE AND COMMON EQUIVALENT SHARE PRIMARY Continuing Operations $ 0.21 $ 0.15 $ 0.53 $ 0.29 Discontinued Operations -- $ -- $ 0.04 $ (0.17) ------- ------ --------- --------- Net Earnings $ 0.21 $ 0.15 $ 0.57 $ 0.12 ======= ====== ========= ========= FULLY DILUTED Continuing Operations $ 0.21 $ 0.15 $ 0.53 $ 0.29 Discontinued Operations -- -- 0.04 (0.17) ------- ------ --------- --------- Net Earnings $ 0.21 $ 0.15 $ 0.57 $ 0.12 ======= ====== ========= ========= Note: In the three and nine months ended March 29, 1996, the dilutive effect of equivalent shares derived from stock options was less than 3 percent and therefore, the equivalent shares were not included in the computation of earnings per share.