Halfway Between 11 and 100

When you ask "What number is halfway between 11 and 100?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=11 and Y=100.

Halfway Between Line

To find the number halfway between 11 and 100, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 11 and 100 into our formula, we get:

(11 + 100)/2 = 55.5

Thus, the number halfway between 11 and 100 is 55.5.

To check that our answer is correct, we subtract 11 from 55.5 and subtract 55.5 from 100 and compare the two numbers:

55.5 - 11 = 44.5
100 - 55.5 = 44.5

As you can see, the halfway number is 44.5 higher than 11 and 44.5 lower than 100. Therefore, our halfway between answer of 55.5 above is correct.

Halfway Between
Find halfway between two other numbers here!

Halfway Between 11 and 101
Here is our next Halfway Between calculation.