math help

What is 9/34 + 2/4?

What is 9/34 + 2/4?

Here's how to add

9
34
+
2
4

Step 1

We still have different denominators (bottom numbers), though, so we need to get a common denominator. This will make the bottom numbers match. Multiply the denominators together first. Now, multiply each numerator by the other term's denominator.

Now we multiply 9 by 4, and get 36, then we multiply 34 by 4 and get 136.

9/34 times 4

Now for the second term. You multiply 2 by 34, and get 68, then multiply 34 by 4 and get 136.

2/4 times 34

This gives us a new problem that looks like so:

36
136
+
68
136

Step 2

Since our denominators match, we can add the numerators.

36 + 68 = 104

That gives us an answer of

104
136

Step 3

Can this fraction be reduced?

First, we attempt to divide it by 2...

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

104
136
÷ 2 =
52
68

Now, try the same number again.

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

52
68
÷ 2 =
26
34

Now, try the same number again.

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

26
34
÷ 2 =
13
17

Now, try the same number again.

Nope. Try the next prime number, 3...

Nope. Try the next prime number, 5...

Nope. Try the next prime number, 7...

Nope. Try the next prime number, 11...

Nope. Try the next prime number, 13...

Nope. Try the next prime number, 17...

No good. 17 is larger than 13. So we're done reducing.

Congratulations! Here's your final answer to 9/34 + 2/4

9
34
+
2
4
=
13
17
© 2014 Randy Tayler