math help

What is 100/50 + 4/11?

What is 100/50 + 4/11?

Here's how we add

100
50
+
4
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 50 by 11 and get 550.

100/50 times 11

Now for the second term. You multiply 4 by 50, and get 200, then multiply 50 by 11 and get 550.

4/11 times 50

This gives us a new problem that looks like so:

1100
550
+
200
550

Step 2

Since our denominators match, we can add the numerators.

1100 + 200 = 1300

So what's the answer so far?

1300
550

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
550
÷ 2 =
650
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:

650
275
÷ 5 =
130
55

Let's try dividing by that again...

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

130
55
÷ 5 =
26
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 100/50 + 4/11

100
50
+
4
11
=
26
11
© 2014 Randy Tayler