Halfway Between 9 and 20

When you ask "What number is halfway between 9 and 20?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=9 and Y=20.

Halfway Between Line

To find the number halfway between 9 and 20, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 9 and 20 into our formula, we get:

(9 + 20)/2 = 14.5

Thus, the number halfway between 9 and 20 is 14.5.

To check that our answer is correct, we subtract 9 from 14.5 and subtract 14.5 from 20 and compare the two numbers:

14.5 - 9 = 5.5
20 - 14.5 = 5.5

As you can see, the halfway number is 5.5 higher than 9 and 5.5 lower than 20. Therefore, our halfway between answer of 14.5 above is correct.

Halfway Between
Find halfway between two other numbers here!

Halfway Between 9 and 21
Here is our next Halfway Between calculation.