
When you ask "What number is halfway between 86 and 102?" 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=102.

To find the number halfway between 86 and 102, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 86 and 102 into our formula, we get:
(86 + 102)/2 = 94
Thus, the number halfway between 86 and 102 is 94.
To check that our answer is correct, we subtract 86 from 94 and subtract 94 from 102 and compare the two numbers:
94 - 86 = 8
102 - 94 = 8
As you can see, the halfway number is 8 higher than 86 and 8 lower than 102. Therefore, our halfway between answer of 94 above is correct.
Halfway Between
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Halfway Between 86 and 103
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