When you ask "What number is halfway between 86 and 415?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=86 and Y=415.
To find the number halfway between 86 and 415, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 86 and 415 into our formula, we get:
(86 + 415)/2 = 250.5
Thus, the number halfway between 86 and 415 is 250.5.
To check that our answer is correct, we subtract 86 from 250.5 and subtract 250.5 from 415 and compare the two numbers:
250.5 - 86 = 164.5
415 - 250.5 = 164.5
As you can see, the halfway number is 164.5 higher than 86 and 164.5 lower than 415. Therefore, our halfway between answer of 250.5 above is correct.
Halfway Between
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Halfway Between 86 and 416
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