Halfway Between 85 and 690

When you ask "What number is halfway between 85 and 690?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=85 and Y=690.

Halfway Between Line

To find the number halfway between 85 and 690, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 85 and 690 into our formula, we get:

(85 + 690)/2 = 387.5

Thus, the number halfway between 85 and 690 is 387.5.

To check that our answer is correct, we subtract 85 from 387.5 and subtract 387.5 from 690 and compare the two numbers:

387.5 - 85 = 302.5
690 - 387.5 = 302.5

As you can see, the halfway number is 302.5 higher than 85 and 302.5 lower than 690. Therefore, our halfway between answer of 387.5 above is correct.

Halfway Between
Find halfway between two other numbers here!

Halfway Between 85 and 691
Here is our next Halfway Between calculation.