Halfway Between 21 and 172

When you ask "What number is halfway between 21 and 172?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=21 and Y=172.

Halfway Between Line

To find the number halfway between 21 and 172, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 21 and 172 into our formula, we get:

(21 + 172)/2 = 96.5

Thus, the number halfway between 21 and 172 is 96.5.

To check that our answer is correct, we subtract 21 from 96.5 and subtract 96.5 from 172 and compare the two numbers:

96.5 - 21 = 75.5
172 - 96.5 = 75.5

As you can see, the halfway number is 75.5 higher than 21 and 75.5 lower than 172. Therefore, our halfway between answer of 96.5 above is correct.

Halfway Between
Find halfway between two other numbers here!

Halfway Between 21 and 173
Here is our next Halfway Between calculation.