Not so fast, it's currently 98.59%. That's technically two 9s!

If 90% is one nine and 99% is two nines, we can use the logarithm to compute how many fractional nines we have at 98.59%: about 1.9788 nines (almost two!)

I think it was a joke that 98.59% has 2 '9's: 9X.X9%.

Yes, you're correct about that

how is this counted? is 79% "one nine"?

Its a joke

>=90 -> one 9 >=99 -> two 9's >=99.9 -> three 9's

Also, you can think of e.g. five 9's as five minutes of downtime per year

got the joke. but it drove home that i wasn't sure how it's counted. thx

and a countable infinity of other invisible smaller ones!!