math help

What is 4/52 + 4/8?

What is 4/52 + 4/8?

Here's how you add

4
52
+
4
8

Step 1

We can't add two fractions with different denominators (the bottom number). So you need to get a common denominator - both bottom numbers need to match. 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 8, and get 32, then we multiply 52 by 8 and get 416.

4/52 times 8

Do the same for the second term. We multiply 4 by 52, and get 208, then multiply 52 by 8 and get 416.

4/8 times 52

So now our fractions look like this:

32
416
+
208
416

Step 2

Since our denominators match, we can add the numerators.

32 + 208 = 240

Now we have an answer.

240
416

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:

240
416
÷ 2 =
120
208

So far so good... let's try to divide by that number again.

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

120
208
÷ 2 =
60
104

So far so good... let's try to divide by that number again.

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

60
104
÷ 2 =
30
52

So far so good... let's try to divide by that number again.

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

30
52
÷ 2 =
15
26

So far so good... let's try to divide by that number again.

No good. So next you try the next prime number, which is 3...

No good. So next you try the next prime number, which is 5...

No good. So next you try the next prime number, which is 7...

No good. So next you try the next prime number, which is 11...

No good. So next you try the next prime number, which is 13...

No good. So next you try the next prime number, which is 17...

No good. 17 is larger than 15. So we're done reducing.

And we're done! Here's the final answer to 4/52 + 4/8

4
52
+
4
8
=
15
26
© 2014 Randy Tayler