What is 45/4 + 1/8?

This is how you add

Step 1

Our denominators (bottom numbers) don't match, so we can't add yet.

Since 4 is evenly divided by 8, we can multiply just one term to get a common denominator.

Multiply 45 by 2, and get 90, then we multiply 4 by 2 and get 8.

The problem now has new fractions to add:

Step 2

Since our denominators match, we can add the numerators.

90 + 1 = 91

This yields the answer

Step 3

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

To find out, we try dividing 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...

No good. 11 is larger than 8. So we're done reducing.

Congratulations! Here's your final answer to 45/4 + 1/8