 # What is 8/10 + 4/12? 8 10
+
 4 12

## 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 8 by 12, and get 96, then we multiply 10 by 12 and get 120. Do the same for the second term. We multiply 4 by 10, and get 40, then multiply 10 by 12 and get 120. The problem now has new fractions to add:

 96 120
+
 40 120

## Step 2

Since our denominators match, we can add the numerators.

96 + 40 = 136

 136 120

## 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:

 136 120
÷ 2 =
 68 60

Now, try the same number again.

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

 68 60
÷ 2 =
 34 30

Now, try the same number again.

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

 34 30
÷ 2 =
 17 15

Now, try the same number again.

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...

No good. 17 is larger than 15. So we're done reducing.