When you ask "What number is halfway between 84 and 393?" 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=393.
To find the number halfway between 84 and 393, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 393 into our formula, we get:
(84 + 393)/2 = 238.5
Thus, the number halfway between 84 and 393 is 238.5.
To check that our answer is correct, we subtract 84 from 238.5 and subtract 238.5 from 393 and compare the two numbers:
238.5 - 84 = 154.5
393 - 238.5 = 154.5
As you can see, the halfway number is 154.5 higher than 84 and 154.5 lower than 393. Therefore, our halfway between answer of 238.5 above is correct.
Halfway Between
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Halfway Between 84 and 394
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