math help

What is 100/24 + 2/10?

What is 100/24 + 2/10?

This is how we add

100
24
+
2
10

Step 1

We can't add two fractions with different denominators (the bottom number). So you need to get a common denominator - both bottom numbers need to match. To do this, you'll multiply the denominators times each other... but the numerators have to change, too. They get multiplied by the other term's denominator.

So we multiply 100 by 10, and get 1000, then we multiply 24 by 10 and get 240.

100/24 times 10

Do the same for the second term. We multiply 2 by 24, and get 48, then multiply 24 by 10 and get 240.

2/10 times 24

So now our fractions look like this:

1000
240
+
48
240

Step 2

Since our denominators match, we can add the numerators.

1000 + 48 = 1048

So the answer is:

1048
240

Step 3

Last of all, we need to simplify the fraction, if possible. Can it be reduced to a simpler fraction?

To find out, we try dividing it by 2...

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

1048
240
÷ 2 =
524
120

Now, try the same number again.

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

524
120
÷ 2 =
262
60

Now, try the same number again.

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

262
60
÷ 2 =
131
30

Now, try the same number again.

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...

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

Congratulations! Here's your final answer to 100/24 + 2/10

100
24
+
2
10
=
131
30
© 2014 Randy Tayler