math help

What is 48/30 + 10/12?

What is 48/30 + 10/12?

This is how you add

48
30
+
10
12

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 48 by 12, and get 576, then we multiply 30 by 12 and get 360.

48/30 times 12

Do the same for the second term. We multiply 10 by 30, and get 300, then multiply 30 by 12 and get 360.

10/12 times 30

So now our fractions look like this:

576
360
+
300
360

Step 2

Since our denominators match, we can add the numerators.

576 + 300 = 876

Now we have an answer.

876
360

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:

876
360
÷ 2 =
438
180

Now, try the same number again.

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

438
180
÷ 2 =
219
90

Now, try the same number again.

Nope. Try the next prime number, 3...

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

219
90
÷ 3 =
73
30

Now, try the same number again.

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 48/30 + 10/12

48
30
+
10
12
=
73
30
© 2014 Randy Tayler

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