Halfway Between 45 and 138

When you ask "What number is halfway between 45 and 138?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=45 and Y=138.

Halfway Between Line

To find the number halfway between 45 and 138, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 45 and 138 into our formula, we get:

(45 + 138)/2 = 91.5

Thus, the number halfway between 45 and 138 is 91.5.

To check that our answer is correct, we subtract 45 from 91.5 and subtract 91.5 from 138 and compare the two numbers:

91.5 - 45 = 46.5
138 - 91.5 = 46.5

As you can see, the halfway number is 46.5 higher than 45 and 46.5 lower than 138. Therefore, our halfway between answer of 91.5 above is correct.

Halfway Between
Find halfway between two other numbers here!

Halfway Between 45 and 139
Here is our next Halfway Between calculation.