When you ask "What number is halfway between 86 and 329?" 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=329.
To find the number halfway between 86 and 329, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 86 and 329 into our formula, we get:
(86 + 329)/2 = 207.5
Thus, the number halfway between 86 and 329 is 207.5.
To check that our answer is correct, we subtract 86 from 207.5 and subtract 207.5 from 329 and compare the two numbers:
207.5 - 86 = 121.5
329 - 207.5 = 121.5
As you can see, the halfway number is 121.5 higher than 86 and 121.5 lower than 329. Therefore, our halfway between answer of 207.5 above is correct.
Halfway Between
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Halfway Between 86 and 330
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