Find a rational number with one decimal place that is between 17 and 18 .

17.5

To find a rational number with one decimal place that is between 17 and 18, we need to look for a number that is greater than 17 and less than 18.

Let's start by converting 17 and 18 to numbers with one decimal place.

17 can be written as 17.0
18 can be written as 18.0

Now, we need to find a number between these two.

From 17.0 to 18.0, we can see that the number 17.5 is right in the middle.

Therefore, a rational number with one decimal place that is between 17 and 18 is 17.5.