When you ask "What number is halfway between 0 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=0 and Y=255.
To find the number halfway between 0 and 255, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 0 and 255 into our formula, we get:
(0 + 255)/2 = 127.5
Thus, the number halfway between 0 and 255 is 127.5.
To check that our answer is correct, we subtract 0 from 127.5 and subtract 127.5 from 255 and compare the two numbers:
127.5 - 0 = 127.5
255 - 127.5 = 127.5
As you can see, the halfway number is 127.5 higher than 0 and 127.5 lower than 255. Therefore, our halfway between answer of 127.5 above is correct.
Halfway Between
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Halfway Between 0 and 256
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