When you ask "What number is halfway between 27 and 388?" 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=388.
To find the number halfway between 27 and 388, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 27 and 388 into our formula, we get:
(27 + 388)/2 = 207.5
Thus, the number halfway between 27 and 388 is 207.5.
To check that our answer is correct, we subtract 27 from 207.5 and subtract 207.5 from 388 and compare the two numbers:
207.5 - 27 = 180.5
388 - 207.5 = 180.5
As you can see, the halfway number is 180.5 higher than 27 and 180.5 lower than 388. Therefore, our halfway between answer of 207.5 above is correct.
Halfway Between
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Halfway Between 27 and 389
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