ENVIROTEST SYSTEMS CORP. EXHIBIT 11 - STATEMENT OF COMPUTATION OF INCOME (LOSS) PER SHARE (Amounts in thousands, except per share amounts) Income (Loss) per share is computed using the weighted average number of shares outstanding plus incremental shares issuable upon exercise of outstanding options using the treasury stock method. Three Months Ended December 31, 1997 1996 ------- ------- BASIC: Net Income (Loss) $ 627 $(6,174) ------- ------- ------- ------- INCOME (LOSS) PER COMMON AND COMMON EQUIVALENT SHARE Weighted average number of shares outstanding 12,108 16,620 ------- ------- Income (Loss) per common and common equivalent share $ 0.05 $ (0.37) ------- ------- ------- ------- DILUTIVE: INCOME (LOSS) PER COMMON SHARE-- ASSUMING DILUTION Weighted average number of shares outstanding 12,108 16,620 Net effect of dilutive stock options based on the treasury method using the average market price of common stock 1,561 -- ------- ------- Common stock and common stock equivalents 13,669 16,620 ------- ------- ------- ------- Income (Loss) per common and common equivalent share $ 0.05 $ (0.37) ------- ------- ------- -------