What is 1/2 - 2/4?

Here's how to subtract 2/4 from 1/2:

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 1 by 4, and get 4.

Then we multiply 2 by 2, and get 4.

Next we give both terms new denominators -- 2 × 4 = 8.

So now our fractions look like this:

Step 2

Since our denominators match, we can subtract the numerators.

4 − 4 = 0

So the answer is: