math help

What is 91/6 + 3/5?

What is 91/6 + 3/5?

Here's how to add

91
6
+
3
5

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 91 by 5, and get 455, then we multiply 6 by 5 and get 30.

91/6 times 5

Now for the second term. You multiply 3 by 6, and get 18, then multiply 6 by 5 and get 30.

3/5 times 6

This gives us a new problem that looks like so:

455
30
+
18
30

Step 2

Since our denominators match, we can add the numerators.

455 + 18 = 473

That gives us an answer of

473
30

Step 3

Can this fraction be reduced?

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

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...

No good. 31 is larger than 30. So we're done reducing.

There you have it! Here's the final answer to 91/6 + 3/5

91
6
+
3
5
=
473
30
© 2014 Randy Tayler