math help

What is 64/16 + 11/12?

What is 64/16 + 11/12?

Here's how you add

64
16
+
11
12

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 12, and get 768, then we multiply 16 by 12 and get 192.

64/16 times 12

Now for the second term. You multiply 11 by 16, and get 176, then multiply 16 by 12 and get 192.

11/12 times 16

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

768
192
+
176
192

Step 2

Since our denominators match, we can add the numerators.

768 + 176 = 944

That gives us the sum, which is

944
192

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:

944
192
÷ 2 =
472
96

Now, try the same number again.

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

472
96
÷ 2 =
236
48

Now, try the same number again.

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

236
48
÷ 2 =
118
24

Now, try the same number again.

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

118
24
÷ 2 =
59
12

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...

No good. 13 is larger than 12. So we're done reducing.

Congratulations! Here's your final answer to 64/16 + 11/12

64
16
+
11
12
=
59
12
© 2014 Randy Tayler

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