math help

What is 25/15 + 1/10?

What is 25/15 + 1/10?

This is how you add

25
15
+
1
10

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 25 by 10, and get 250, then we multiply 15 by 10 and get 150.

25/15 times 10

Now for the second term. You multiply 1 by 15, and get 15, then multiply 15 by 10 and get 150.

1/10 times 15

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

250
150
+
15
150

Step 2

Since our denominators match, we can add the numerators.

250 + 15 = 265

Answer:

265
150

Step 3

Now, do we need to simplify this fraction?

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

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:

265
150
÷ 5 =
53
30

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...

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...

No good. 31 is larger than 30. So we're done reducing.

There you have it! Here's the final answer to 25/15 + 1/10

25
15
+
1
10
=
53
30
© 2014 Randy Tayler