math help

What is 10/6 + 1/9?

What is 10/6 + 1/9?

Here's how you add

10
6
+
1
9

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 10 by 9, and get 90, then we multiply 6 by 9 and get 54.

10/6 times 9

Do the same for the second term. We multiply 1 by 6, and get 6, then multiply 6 by 9 and get 54.

1/9 times 6

The problem now has new fractions to add:

90
54
+
6
54

Step 2

Since our denominators match, we can add the numerators.

90 + 6 = 96

This yields the answer

96
54

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:

96
54
÷ 2 =
48
27

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:

48
27
÷ 3 =
16
9

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. 11 is larger than 9. So we're done reducing.

And we're done! Here's the final answer to 10/6 + 1/9

10
6
+
1
9
=
16
9
© 2014 Randy Tayler