 # What is 7/16 + 4/12? 7 16
+
 4 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 7 by 12, and get 84, then we multiply 16 by 12 and get 192. Now for the second term. You multiply 4 by 16, and get 64, then multiply 16 by 12 and get 192. We now have a new problem, that looks like this:

 84 192
+
 64 192

## Step 2

Since our denominators match, we can add the numerators.

84 + 64 = 148

That gives us the sum, which is

 148 192

## 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:

 148 192
÷ 2 =
 74 96

Let's try dividing by that again...

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

 74 96
÷ 2 =
 37 48

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...

Nope! So now we try the next greatest prime number, 23...

Nope! So now we try the next greatest prime number, 29...

Nope! So now we try the next greatest prime number, 31...

Nope! So now we try the next greatest prime number, 37...

Nope! So now we try the next greatest prime number, 41...

No good. 41 is larger than 37. So we're done reducing.

There you have it! Here's the final answer to 7/16 + 4/12

 7 16
+
 4 12
=
 37 48