math help

What is 100/100 + 8/12?

What is 100/100 + 8/12?

This is how we add

100
100
+
8
12

Step 1

We can't add two fractions with different denominators (the bottom number). So you need to get a common denominator - both bottom numbers need to match. To do this, you'll multiply the denominators times each other... but the numerators have to change, too. They get multiplied by the other term's denominator.

So we multiply 100 by 12, and get 1200, then we multiply 100 by 12 and get 1200.

100/100 times 12

Do the same for the second term. We multiply 8 by 100, and get 800, then multiply 100 by 12 and get 1200.

8/12 times 100

So now our fractions look like this:

1200
1200
+
800
1200

Step 2

Since our denominators match, we can add the numerators.

1200 + 800 = 2000

Now we have an answer.

2000
1200

Step 3

Last of all, we need to simplify the fraction, if possible. Can it be reduced to a simpler fraction?

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:

2000
1200
÷ 2 =
1000
600

Now, try the same number again.

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

1000
600
÷ 2 =
500
300

Now, try the same number again.

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

500
300
÷ 2 =
250
150

Now, try the same number again.

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

250
150
÷ 2 =
125
75

Now, try the same number again.

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

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

Are both the numerator and the denominator evenly divisible by 5? Yes! So we reduce it:

125
75
÷ 5 =
25
15

Now, try the same number again.

Are both the numerator and the denominator evenly divisible by 5? Yes! So we reduce it:

25
15
÷ 5 =
5
3

Now, try the same number again.

No good. 5 is larger than 3. So we're done reducing.

Congratulations! Here's your final answer to 100/100 + 8/12

100
100
+
8
12
=
5
3
© 2014 Randy Tayler