When you ask "What number is halfway between 86 and 249?" 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=249.
To find the number halfway between 86 and 249, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 86 and 249 into our formula, we get:
(86 + 249)/2 = 167.5
Thus, the number halfway between 86 and 249 is 167.5.
To check that our answer is correct, we subtract 86 from 167.5 and subtract 167.5 from 249 and compare the two numbers:
167.5 - 86 = 81.5
249 - 167.5 = 81.5
As you can see, the halfway number is 81.5 higher than 86 and 81.5 lower than 249. Therefore, our halfway between answer of 167.5 above is correct.
Halfway Between
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Halfway Between 86 and 250
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