math help

What is 91/1 + 2/10?

What is 91/1 + 2/10?

This is how to add

91
1
+
2
10

Step 1

We have to make sure the denominators are equal.

Since 1 is evenly divided by 10, we can multiply just one term to get a common denominator.

Multiply 91 by 10, and get 910, then we multiply 1 by 10 and get 10.

91/1 times 10

So now our fractions look like this:

910
10
+
2
10

Step 2

Since our denominators match, we can add the numerators.

910 + 2 = 912

So the answer is:

912
10

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:

912
10
÷ 2 =
456
5

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...

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. 7 is larger than 5. So we're done reducing.

And we're done! Here's the final answer to 91/1 + 2/10

91
1
+
2
10
=
456
5
© 2014 Randy Tayler