When you ask "What number is halfway between 84 and 259?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=84 and Y=259.
To find the number halfway between 84 and 259, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 259 into our formula, we get:
(84 + 259)/2 = 171.5
Thus, the number halfway between 84 and 259 is 171.5.
To check that our answer is correct, we subtract 84 from 171.5 and subtract 171.5 from 259 and compare the two numbers:
171.5 - 84 = 87.5
259 - 171.5 = 87.5
As you can see, the halfway number is 87.5 higher than 84 and 87.5 lower than 259. Therefore, our halfway between answer of 171.5 above is correct.
Halfway Between
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Halfway Between 84 and 260
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