What is 45/4 + 1/5?

This is how to add

Step 1

Can you add yet? Nope! The denominators don't match. We need a common denominator. So next we take both denominators and multiply them. Next, take each numerator and multiply it by the denominator of the other term.

So, we multiply 45 by 5, and get 225, then we multiply 4 by 5 and get 20.

Now for the second term. You multiply 1 by 4, and get 4, then multiply 4 by 5 and get 20.

We now have a new problem, that looks like this:

Step 2

Since our denominators match, we can add the numerators.

225 + 4 = 229

That gives us the sum, which is

Step 3

Now, do we need to simplify this fraction?

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

Nope. Try the next prime number, 3...

Nope. Try the next prime number, 5...

Nope. Try the next prime number, 7...

Nope. Try the next prime number, 11...

Nope. Try the next prime number, 13...

Nope. Try the next prime number, 17...

Nope. Try the next prime number, 19...

Nope. Try the next prime number, 23...

No good. 23 is larger than 20. So we're done reducing.

Congratulations! Here's your final answer to 45/4 + 1/5