math help

What is 91/6 + 5/10?

What is 91/6 + 5/10?

Here's how to add

91
6
+
5
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 91 by 10, and get 910, then we multiply 6 by 10 and get 60.

91/6 times 10

Do the same for the second term. We multiply 5 by 6, and get 30, then multiply 6 by 10 and get 60.

5/10 times 6

So now our fractions look like this:

910
60
+
30
60

Step 2

Since our denominators match, we can add the numerators.

910 + 30 = 940

So the answer is:

940
60

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:

940
60
÷ 2 =
470
30

Now, try the same number again.

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

470
30
÷ 2 =
235
15

Now, try the same number again.

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

Nope. Try the next prime number, 5...

Are both the numerator and the denominator evenly divisible by 5? Yes! So we reduce it:

235
15
÷ 5 =
47
3

Now, try the same number again.

No good. 5 is larger than 3. So we're done reducing.

Congratulations! Here's your final answer to 91/6 + 5/10

91
6
+
5
10
=
47
3
© 2014 Randy Tayler