math help

What is 100/100 + 6/7?

What is 100/100 + 6/7?

This is how we add

100
100
+
6
7

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 7, and get 700, then we multiply 100 by 7 and get 700.

100/100 times 7

Now for the second term. You multiply 6 by 100, and get 600, then multiply 100 by 7 and get 700.

6/7 times 100

This gives us a new problem that looks like so:

700
700
+
600
700

Step 2

Since our denominators match, we can add the numerators.

700 + 600 = 1300

So what's the answer so far?

1300
700

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
700
÷ 2 =
650
350

Let's try dividing by that again...

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

650
350
÷ 2 =
325
175

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
175
÷ 5 =
65
35

Let's try dividing by that again...

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

65
35
÷ 5 =
13
7

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...

No good. 11 is larger than 7. So we're done reducing.

There you have it! Here's the final answer to 100/100 + 6/7

100
100
+
6
7
=
13
7
© 2014 Randy Tayler