What is 9/10 - 8/10?

Here's how to subtract 8/10 from 9/10:

Step 1

Since our denominators match, we can subtract the numerators.

9 − 8 = 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.