What is 3/18 - 2/12?

Here's how to subtract 2/12 from 3/18:

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 3 by 12, and get 36.

Then we multiply 2 by 18, and get 36.

Next we give both terms new denominators -- 18 × 12 = 216.

So now our fractions look like this:

Step 2

Since our denominators match, we can subtract the numerators.

36 − 36 = 0

So the answer is: