Halfway Between 20 and 688

When you ask "What number is halfway between 20 and 688?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=20 and Y=688.

Halfway Between Line

To find the number halfway between 20 and 688, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 20 and 688 into our formula, we get:

(20 + 688)/2 = 354

Thus, the number halfway between 20 and 688 is 354.

To check that our answer is correct, we subtract 20 from 354 and subtract 354 from 688 and compare the two numbers:

354 - 20 = 334
688 - 354 = 334

As you can see, the halfway number is 334 higher than 20 and 334 lower than 688. Therefore, our halfway between answer of 354 above is correct.

Halfway Between
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