When you ask "What number is halfway between 78 and 325?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=78 and Y=325.
To find the number halfway between 78 and 325, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 78 and 325 into our formula, we get:
(78 + 325)/2 = 201.5
Thus, the number halfway between 78 and 325 is 201.5.
To check that our answer is correct, we subtract 78 from 201.5 and subtract 201.5 from 325 and compare the two numbers:
201.5 - 78 = 123.5
325 - 201.5 = 123.5
As you can see, the halfway number is 123.5 higher than 78 and 123.5 lower than 325. Therefore, our halfway between answer of 201.5 above is correct.
Halfway Between
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Halfway Between 78 and 326
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