math help

What is 100/100 + 5/11?

What is 100/100 + 5/11?

This is how to add

100
100
+
5
11

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 11, and get 1100, then we multiply 100 by 11 and get 1100.

100/100 times 11

Do the same for the second term. We multiply 5 by 100, and get 500, then multiply 100 by 11 and get 1100.

5/11 times 100

So now our fractions look like this:

1100
1100
+
500
1100

Step 2

Since our denominators match, we can add the numerators.

1100 + 500 = 1600

So the answer is:

1600
1100

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:

1600
1100
÷ 2 =
800
550

Let's try dividing by that again...

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

800
550
÷ 2 =
400
275

Let's try dividing by that again...

Nope! So now we try the next greatest prime number, 3...

Nope! So now we try the next greatest prime number, 5...

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

400
275
÷ 5 =
80
55

Let's try dividing by that again...

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

80
55
÷ 5 =
16
11

Let's try dividing by that again...

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...

No good. 13 is larger than 11. So we're done reducing.

There you have it! Here's the final answer to 100/100 + 5/11

100
100
+
5
11
=
16
11
© 2014 Randy Tayler