math help

What is 16/48 + 2/5?

What is 16/48 + 2/5?

Let's add

16
48
+
2
5

Step 1

Can you add yet? Nope! The denominators don't match. We need a common denominator. So next we take both denominators and multiply them. Next, take each numerator and multiply it by the denominator of the other term.

So, we multiply 16 by 5, and get 80, then we multiply 48 by 5 and get 240.

16/48 times 5

Now for the second term. You multiply 2 by 48, and get 96, then multiply 48 by 5 and get 240.

2/5 times 48

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

80
240
+
96
240

Step 2

Since our denominators match, we can add the numerators.

80 + 96 = 176

That gives us the sum, which is

176
240

Step 3

Now, do we need to simplify this fraction?

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

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

176
240
÷ 2 =
88
120

So far so good... let's try to divide by that number again.

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

88
120
÷ 2 =
44
60

So far so good... let's try to divide by that number again.

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

44
60
÷ 2 =
22
30

So far so good... let's try to divide by that number again.

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

22
30
÷ 2 =
11
15

So far so good... let's try to divide by that number again.

No good. So next you try the next prime number, which is 3...

No good. So next you try the next prime number, which is 5...

No good. So next you try the next prime number, which is 7...

No good. So next you try the next prime number, which is 11...

No good. So next you try the next prime number, which is 13...

No good. 13 is larger than 11. So we're done reducing.

And we're done! Here's the final answer to 16/48 + 2/5

16
48
+
2
5
=
11
15
© 2014 Randy Tayler