When you ask "What number is halfway between 85 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=85 and Y=102.
To find the number halfway between 85 and 102, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 85 and 102 into our formula, we get:
(85 + 102)/2 = 93.5
Thus, the number halfway between 85 and 102 is 93.5.
To check that our answer is correct, we subtract 85 from 93.5 and subtract 93.5 from 102 and compare the two numbers:
93.5 - 85 = 8.5
102 - 93.5 = 8.5
As you can see, the halfway number is 8.5 higher than 85 and 8.5 lower than 102. Therefore, our halfway between answer of 93.5 above is correct.
Halfway Between
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Halfway Between 85 and 103
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