When you ask "What number is halfway between 84 and 159?" 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=159.
To find the number halfway between 84 and 159, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 159 into our formula, we get:
(84 + 159)/2 = 121.5
Thus, the number halfway between 84 and 159 is 121.5.
To check that our answer is correct, we subtract 84 from 121.5 and subtract 121.5 from 159 and compare the two numbers:
121.5 - 84 = 37.5
159 - 121.5 = 37.5
As you can see, the halfway number is 37.5 higher than 84 and 37.5 lower than 159. Therefore, our halfway between answer of 121.5 above is correct.
Halfway Between
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Halfway Between 84 and 160
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