math help

What is 13/100 + 4/10?

What is 13/100 + 4/10?

Let's add

13
100
+
4
10

Step 1

Our denominators (bottom numbers) don't match, so we can't add yet.

100 goes into 10 evenly, so we only need to multiply one term to get a common denominator.

Multiply 4 by 10, and get 40, then we multiply 10 by 10 and get 100.

4/10 times 10

We now have a new problem, that looks like this:

13
100
+
40
100

Step 2

Since our denominators match, we can add the numerators.

13 + 40 = 53

That gives us the sum, which is

53
100

Step 3

Now, do we need to simplify this fraction?

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

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...

Nope. Try the next prime number, 19...

Nope. Try the next prime number, 23...

Nope. Try the next prime number, 29...

Nope. Try the next prime number, 31...

Nope. Try the next prime number, 37...

Nope. Try the next prime number, 41...

Nope. Try the next prime number, 43...

Nope. Try the next prime number, 47...

Nope. Try the next prime number, 53...

Nope. Try the next prime number, 59...

No good. 59 is larger than 53. So we're done reducing.

Congratulations! Here's your final answer to 13/100 + 4/10

13
100
+
4
10
=
53
100
© 2014 Randy Tayler