Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
(days from september 12th 2001 to september 28th 2002 + 1)/(days from september 29th 1995 to september 11th 2001 + 1)
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random