12 goes right into 3 evenly, so us only need to multiply one term to get a typical denominator.

You are watching: 7/12 - 1/3

Multiply 1 by 4, and get 4, then us multiply 3 by 4 and also get 12.

*

We now have a brand-new problem, the looks like this:

4
12
+7
12

Step 2

Since our denominators match, we can include the numerators.

4 + 7 = 11

That provides us the sum, i beg your pardon is

11
12

Step 3

Now, carry out we should simplify this fraction?

First, us attempt to divide it through 2...

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

No good. So following you shot the next prime number, i m sorry is 5...

No good. So following you try the following prime number, i m sorry is 7...

No good. So next you try the following prime number, i beg your pardon is 11...

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

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No good. 13 is bigger than 11. For this reason we"re done reducing.

And we"re done! Here"s the last answer come 1/3 + 7/121
3
+7
12
=11
12

© 2014 Randy Tayler
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