
When you ask "What number is halfway between 84 and 507?" 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=507.

To find the number halfway between 84 and 507, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 507 into our formula, we get:
(84 + 507)/2 = 295.5
Thus, the number halfway between 84 and 507 is 295.5.
To check that our answer is correct, we subtract 84 from 295.5 and subtract 295.5 from 507 and compare the two numbers:
295.5 - 84 = 211.5
507 - 295.5 = 211.5
As you can see, the halfway number is 211.5 higher than 84 and 211.5 lower than 507. Therefore, our halfway between answer of 295.5 above is correct.
Halfway Between
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Halfway Between 84 and 508
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