What is 6/9 - 8/9?

Here's how to subtract 8/9 from 6/9:

Step 1

Since our denominators match, we can subtract the numerators.

6 − 8 = -2

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...

Nope! So now we try the next greatest prime number, 3...

No good. 3 is larger than -2. So we're done reducing.