math help

What is 4/6 - 7/12?

What is 4/6 - 7/12?

Here's how to subtract 7/12 from 4/6:

4
6
7
12

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 4 by 12, and get 48.

Then we multiply 7 by 6, and get 42.

Next we give both terms new denominators -- 6 × 12 = 72.

So now our fractions look like this:

48
72
42
72

Step 2

Since our denominators match, we can subtract the numerators.

48 − 42 = 6

So the answer is:

6
72

Step 3

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...

Are both the numerator and the denominator evenly divisible by 2? Yes! So we reduce it:

6
72
÷ 2 =
3
36

Let's try dividing by 2 again...

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

Are both the numerator and the denominator evenly divisible by 3? Yes! So we reduce it:

3
36
÷ 3 =
1
12

Let's try dividing by 3 again...

No good. 3 is larger than 1. So we're done reducing.

There you have it! The final answer is:
4
6
7
12
=
1
12