When you ask "What number is halfway between 85 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=85 and Y=408.
To find the number halfway between 85 and 408, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 85 and 408 into our formula, we get:
(85 + 408)/2 = 246.5
Thus, the number halfway between 85 and 408 is 246.5.
To check that our answer is correct, we subtract 85 from 246.5 and subtract 246.5 from 408 and compare the two numbers:
246.5 - 85 = 161.5
408 - 246.5 = 161.5
As you can see, the halfway number is 161.5 higher than 85 and 161.5 lower than 408. Therefore, our halfway between answer of 246.5 above is correct.
Halfway Between
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Halfway Between 85 and 409
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