Math!!

360－e
------------- X 100% = －10%
e

360-e = - 0.1 e

360 = 0.9e

e = 400

2007-11-17 13:13:18 補充：
樓下個位你有冇check數架?-10%/100% = -0.1根據你個ans360-180/180 * 100% = 1點會出-10%呀?

2007-11-17 13:14:54 補充：
我跳得太快..係度 多個step360-e = - 0.1 e360 = -0.1e 1e360 = 0.9 e360/0.9e = 0.9e/0.9e e = 400

360-e/e x100%=-10%

360-e/e =-10%/100%

360-e/e=1

360-e=e

360=2e

e=180