math help

What is 64/4 + 7/11?

What is 64/4 + 7/11?

This is how you add

64
4
+
7
11

Step 1

Of course, you can't add two fractions if the denominators (bottom numbers) don't match. To get a common denominator, multiply the denominators together. Then we fix the numerators by multiplying each one by their other term's denominator.

Now you multiply 64 by 11, and get 704, then we multiply 4 by 11 and get 44.

64/4 times 11

Do the same for the second term. We multiply 7 by 4, and get 28, then multiply 4 by 11 and get 44.

7/11 times 4

The problem now has new fractions to add:

704
44
+
28
44

Step 2

Since our denominators match, we can add the numerators.

704 + 28 = 732

The sum we get is

732
44

Step 3

The last step is to reduce the fraction if we can.

To find out, we try dividing it by 2...

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

732
44
÷ 2 =
366
22

So far so good... let's try to divide by that number again.

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

366
22
÷ 2 =
183
11

So far so good... let's try to divide by that number again.

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 11. So we're done reducing.

And we're done! Here's the final answer to 64/4 + 7/11

64
4
+
7
11
=
183
11
© 2014 Randy Tayler