Halfway Between 15 and 665

When you ask "What number is halfway between 15 and 665?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=15 and Y=665.

Halfway Between Line

To find the number halfway between 15 and 665, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 15 and 665 into our formula, we get:

(15 + 665)/2 = 340

Thus, the number halfway between 15 and 665 is 340.

To check that our answer is correct, we subtract 15 from 340 and subtract 340 from 665 and compare the two numbers:

340 - 15 = 325
665 - 340 = 325

As you can see, the halfway number is 325 higher than 15 and 325 lower than 665. Therefore, our halfway between answer of 340 above is correct.

Halfway Between
Find halfway between two other numbers here!

Halfway Between 15 and 666
Here is our next Halfway Between calculation.