math help

What is 60/48 + 3/5?

What is 60/48 + 3/5?

Here's how we add

60
48
+
3
5

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 60 by 5, and get 300, then we multiply 48 by 5 and get 240.

60/48 times 5

Do the same for the second term. We multiply 3 by 48, and get 144, then multiply 48 by 5 and get 240.

3/5 times 48

So now our fractions look like this:

300
240
+
144
240

Step 2

Since our denominators match, we can add the numerators.

300 + 144 = 444

Now we have an answer.

444
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:

444
240
÷ 2 =
222
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:

222
120
÷ 2 =
111
60

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...

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

111
60
÷ 3 =
37
20

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 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. So next you try the next prime number, which is 17...

No good. So next you try the next prime number, which is 19...

No good. So next you try the next prime number, which is 23...

No good. 23 is larger than 20. So we're done reducing.

And we're done! Here's the final answer to 60/48 + 3/5

60
48
+
3
5
=
37
20
© 2014 Randy Tayler