math help

What is 4/52 + 2/8?

What is 4/52 + 2/8?

This is how we add

4
52
+
2
8

Step 1

Of course, you can't add two fractions if the denominators (bottom numbers) don't match. To get a common denominator, multiply the denominators together. Then we fix the numerators by multiplying each one by their other term's denominator.

Now you 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 2 by 52, and get 104, then multiply 52 by 8 and get 416.

2/8 times 52

The problem now has new fractions to add:

32
416
+
104
416

Step 2

Since our denominators match, we can add the numerators.

32 + 104 = 136

This yields the answer

136
416

Step 3

The last step is to reduce the fraction if we can.

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:

136
416
÷ 2 =
68
208

Let's try dividing by that again...

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

68
208
÷ 2 =
34
104

Let's try dividing by that again...

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

34
104
÷ 2 =
17
52

Let's try dividing by that again...

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

Nope! So now we try the next greatest prime number, 5...

Nope! So now we try the next greatest prime number, 7...

Nope! So now we try the next greatest prime number, 11...

Nope! So now we try the next greatest prime number, 13...

Nope! So now we try the next greatest prime number, 17...

Nope! So now we try the next greatest prime number, 19...

No good. 19 is larger than 17. So we're done reducing.

There you have it! Here's the final answer to 4/52 + 2/8

4
52
+
2
8
=
17
52
© 2014 Randy Tayler