math help

What is 7/12 + 6/8?

What is 7/12 + 6/8?

Here's how you add

7
12
+
6
8

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 7 by 8, and get 56, then we multiply 12 by 8 and get 96.

7/12 times 8

Now for the second term. You multiply 6 by 12, and get 72, then multiply 12 by 8 and get 96.

6/8 times 12

This gives us a new problem that looks like so:

56
96
+
72
96

Step 2

Since our denominators match, we can add the numerators.

56 + 72 = 128

That gives us an answer of

128
96

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:

128
96
÷ 2 =
64
48

Let's try dividing by that again...

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

64
48
÷ 2 =
32
24

Let's try dividing by that again...

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

32
24
÷ 2 =
16
12

Let's try dividing by that again...

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

16
12
÷ 2 =
8
6

Let's try dividing by that again...

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

8
6
÷ 2 =
4
3

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...

No good. 5 is larger than 4. So we're done reducing.

There you have it! Here's the final answer to 7/12 + 6/8

7
12
+
6
8
=
4
3
© 2014 Randy Tayler