
When you ask "What number is halfway between 28 and 679?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=28 and Y=679.

To find the number halfway between 28 and 679, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 28 and 679 into our formula, we get:
(28 + 679)/2 = 353.5
Thus, the number halfway between 28 and 679 is 353.5.
To check that our answer is correct, we subtract 28 from 353.5 and subtract 353.5 from 679 and compare the two numbers:
353.5 - 28 = 325.5
679 - 353.5 = 325.5
As you can see, the halfway number is 325.5 higher than 28 and 325.5 lower than 679. Therefore, our halfway between answer of 353.5 above is correct.
Halfway Between
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Halfway Between 28 and 680
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