When you ask "What number is halfway between 25 and 408?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=25 and Y=408.
To find the number halfway between 25 and 408, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 408 into our formula, we get:
(25 + 408)/2 = 216.5
Thus, the number halfway between 25 and 408 is 216.5.
To check that our answer is correct, we subtract 25 from 216.5 and subtract 216.5 from 408 and compare the two numbers:
216.5 - 25 = 191.5
408 - 216.5 = 191.5
As you can see, the halfway number is 191.5 higher than 25 and 191.5 lower than 408. Therefore, our halfway between answer of 216.5 above is correct.
Halfway Between
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Halfway Between 25 and 409
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