When you ask "What number is halfway between 27 and 108?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=27 and Y=108.
To find the number halfway between 27 and 108, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 27 and 108 into our formula, we get:
(27 + 108)/2 = 67.5
Thus, the number halfway between 27 and 108 is 67.5.
To check that our answer is correct, we subtract 27 from 67.5 and subtract 67.5 from 108 and compare the two numbers:
67.5 - 27 = 40.5
108 - 67.5 = 40.5
As you can see, the halfway number is 40.5 higher than 27 and 40.5 lower than 108. Therefore, our halfway between answer of 67.5 above is correct.
Halfway Between
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Halfway Between 27 and 109
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