Agreen snake was 8/9 yard long. a garter. a hater
snake is 13/18 yard longer. how much longer is the green snake then the garter

First, we're going to find the LCD, Least Common Denominator, of both fractions.
9- 9, 18, 27, 36.
18- 18, 36, 54, 72.

As you can see, 18 is the LCD of both fractions.

Then we're going to multiply both the fractions to get the denominator the same.
x 2 = 
x 1 = 

*Remember, whatever you do to the top, you do to the bottom.*
**Do not follow the rule above if you are not making the denominators the same.**

Now we're going to subtract  by 
-  = 

Then, we're going to simplify it.
/ 3 = 

This is how we get our answer, 

Our final answer is 

Hope this helps!~