What is 9/11 - 10/11?

Here's how to subtract 10/11 from 9/11:

Step 1

Since our denominators match, we can subtract the numerators.

9 − 10 = -1

So the answer is:

Step 2

Last of all, we need to simplify the fraction, if possible. Can it be reduced to a simpler fraction?

To find out, we try dividing it by 2...

No good. 2 is larger than -1. So we're done reducing.