
When you ask "What number is halfway between 88 and 403?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=88 and Y=403.

To find the number halfway between 88 and 403, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 88 and 403 into our formula, we get:
(88 + 403)/2 = 245.5
Thus, the number halfway between 88 and 403 is 245.5.
To check that our answer is correct, we subtract 88 from 245.5 and subtract 245.5 from 403 and compare the two numbers:
245.5 - 88 = 157.5
403 - 245.5 = 157.5
As you can see, the halfway number is 157.5 higher than 88 and 157.5 lower than 403. Therefore, our halfway between answer of 245.5 above is correct.
Halfway Between
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Halfway Between 88 and 404
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