Halfway Between 100 and 255

When you ask "What number is halfway between 100 and 255?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=100 and Y=255.

Halfway Between Line

To find the number halfway between 100 and 255, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 100 and 255 into our formula, we get:

(100 + 255)/2 = 177.5

Thus, the number halfway between 100 and 255 is 177.5.

To check that our answer is correct, we subtract 100 from 177.5 and subtract 177.5 from 255 and compare the two numbers:

177.5 - 100 = 77.5
255 - 177.5 = 77.5

As you can see, the halfway number is 77.5 higher than 100 and 77.5 lower than 255. Therefore, our halfway between answer of 177.5 above is correct.

Halfway Between
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Halfway Between 100 and 256
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