When you ask "What number is halfway between 28 and 99?" 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=99.
To find the number halfway between 28 and 99, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 28 and 99 into our formula, we get:
(28 + 99)/2 = 63.5
Thus, the number halfway between 28 and 99 is 63.5.
To check that our answer is correct, we subtract 28 from 63.5 and subtract 63.5 from 99 and compare the two numbers:
63.5 - 28 = 35.5
99 - 63.5 = 35.5
As you can see, the halfway number is 35.5 higher than 28 and 35.5 lower than 99. Therefore, our halfway between answer of 63.5 above is correct.
Halfway Between
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Halfway Between 28 and 100
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