What is 2/3 - 6/9?

Here's how to subtract 6/9 from 2/3:

Step 1

We can't subtract two fractions with different denominators. So you need to get a common denominator. To do this, you'll multiply the denominators times each other... but the numerators have to change, too. They get multiplied by the other term's denominator.

So we multiply 2 by 9, and get 18.

Then we multiply 6 by 3, and get 18.

Next we give both terms new denominators -- 3 × 9 = 27.

So now our fractions look like this:

Step 2

Since our denominators match, we can subtract the numerators.

18 − 18 = 0

So the answer is: