"What percentage of visits will see the change?" breaks on 99.0%+

The calculator is awesome--thanks!

I tried inputting 99.99%, and got a really weird answer. I'm pretty sure its because of the way JS processes decimals. Maybe a solution is to not allow any values between 99.0% and 100%, non-inclusive? Not sure what the best solution would be.

Anyways, just wanted to leave this here in case anyone uses this in the future.