math help

What is 100/24 + 4/10?

What is 100/24 + 4/10?

Here's how you add

100
24
+
4
10

Step 1

Of course, you can't add two fractions if the denominators (bottom numbers) don't match. To get a common denominator, multiply the denominators together. Then we fix the numerators by multiplying each one by their other term's denominator.

Now you 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 4 by 24, and get 96, then multiply 24 by 10 and get 240.

4/10 times 24

The problem now has new fractions to add:

1000
240
+
96
240

Step 2

Since our denominators match, we can add the numerators.

1000 + 96 = 1096

This yields the answer

1096
240

Step 3

The last step is to reduce the fraction if we can.

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:

1096
240
÷ 2 =
548
120

Let's try dividing by that again...

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

548
120
÷ 2 =
274
60

Let's try dividing by that again...

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

274
60
÷ 2 =
137
30

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...

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 100/24 + 4/10

100
24
+
4
10
=
137
30
© 2014 Randy Tayler