math help

What is 48/30 + 4/11?

What is 48/30 + 4/11?

This is how you add

48
30
+
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 48 by 11, and get 528, then we multiply 30 by 11 and get 330.

48/30 times 11

Now for the second term. You multiply 4 by 30, and get 120, then multiply 30 by 11 and get 330.

4/11 times 30

This gives us a new problem that looks like so:

528
330
+
120
330

Step 2

Since our denominators match, we can add the numerators.

528 + 120 = 648

So what's the answer so far?

648
330

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:

648
330
÷ 2 =
324
165

Let's try dividing by that again...

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

Are both the numerator and the denominator evenly divisible by 3? Yes! So we reduce it:

324
165
÷ 3 =
108
55

Let's try dividing by that again...

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

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...

Nope! So now we try the next greatest prime number, 17...

Nope! So now we try the next greatest prime number, 19...

Nope! So now we try the next greatest prime number, 23...

Nope! So now we try the next greatest prime number, 29...

Nope! So now we try the next greatest prime number, 31...

Nope! So now we try the next greatest prime number, 37...

Nope! So now we try the next greatest prime number, 41...

Nope! So now we try the next greatest prime number, 43...

Nope! So now we try the next greatest prime number, 47...

Nope! So now we try the next greatest prime number, 53...

Nope! So now we try the next greatest prime number, 59...

No good. 59 is larger than 55. So we're done reducing.

There you have it! Here's the final answer to 48/30 + 4/11

48
30
+
4
11
=
108
55
© 2014 Randy Tayler