When you ask "What number is halfway between 72 and 915?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=72 and Y=915.
To find the number halfway between 72 and 915, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 72 and 915 into our formula, we get:
(72 + 915)/2 = 493.5
Thus, the number halfway between 72 and 915 is 493.5.
To check that our answer is correct, we subtract 72 from 493.5 and subtract 493.5 from 915 and compare the two numbers:
493.5 - 72 = 421.5
915 - 493.5 = 421.5
As you can see, the halfway number is 421.5 higher than 72 and 421.5 lower than 915. Therefore, our halfway between answer of 493.5 above is correct.
Halfway Between
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Halfway Between 72 and 916
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