math help

What is 100/100 + 2/11?

What is 100/100 + 2/11?

This is how we add

100
100
+
2
11

Step 1

We still have different denominators (bottom numbers), though, so we need to get a common denominator. This will make the bottom numbers match. Multiply the denominators together first. Now, multiply each numerator by the other term's denominator.

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

100/100 times 11

Now for the second term. You multiply 2 by 100, and get 200, then multiply 100 by 11 and get 1100.

2/11 times 100

This gives us a new problem that looks like so:

1100
1100
+
200
1100

Step 2

Since our denominators match, we can add the numerators.

1100 + 200 = 1300

So what's the answer so far?

1300
1100

Step 3

Can this fraction be reduced?

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

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

1300
1100
÷ 2 =
650
550

Let's try dividing by that again...

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

650
550
÷ 2 =
325
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:

325
275
÷ 5 =
65
55

Let's try dividing by that again...

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

65
55
÷ 5 =
13
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 + 2/11

100
100
+
2
11
=
13
11
© 2014 Randy Tayler