math help

What is 64/16 + 2/9?

What is 64/16 + 2/9?

Here's how to add

64
16
+
2
9

Step 1

Can you add yet? Nope! The denominators don't match. We need a common denominator. So next we take both denominators and multiply them. Next, take each numerator and multiply it by the denominator of the other term.

So, we multiply 64 by 9, and get 576, then we multiply 16 by 9 and get 144.

64/16 times 9

Now for the second term. You multiply 2 by 16, and get 32, then multiply 16 by 9 and get 144.

2/9 times 16

We now have a new problem, that looks like this:

576
144
+
32
144

Step 2

Since our denominators match, we can add the numerators.

576 + 32 = 608

Answer:

608
144

Step 3

Now, do we need to simplify this fraction?

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

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

608
144
÷ 2 =
304
72

Now, try the same number again.

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

304
72
÷ 2 =
152
36

Now, try the same number again.

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

152
36
÷ 2 =
76
18

Now, try the same number again.

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

76
18
÷ 2 =
38
9

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...

No good. 11 is larger than 9. So we're done reducing.

Congratulations! Here's your final answer to 64/16 + 2/9

64
16
+
2
9
=
38
9
© 2014 Randy Tayler