math help

What is 80/2 + 7/12?

What is 80/2 + 7/12?

This is how we add

80
2
+
7
12

Step 1

We have to make sure the denominators are equal.

12 goes into 2 evenly, so we only need to multiply one term to get a common denominator.

Multiply 80 by 6, and get 480, then we multiply 2 by 6 and get 12.

80/2 times 6

This gives us a new problem that looks like so:

480
12
+
7
12

Step 2

Since our denominators match, we can add the numerators.

480 + 7 = 487

So what's the answer so far?

487
12

Step 3

Can this fraction be reduced?

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

No good. So next you try the next prime number, which is 3...

No good. So next you try the next prime number, which is 5...

No good. So next you try the next prime number, which is 7...

No good. So next you try the next prime number, which is 11...

No good. So next you try the next prime number, which is 13...

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

And we're done! Here's the final answer to 80/2 + 7/12

80
2
+
7
12
=
487
12
© 2014 Randy Tayler