When you ask "What number is halfway between 15 and 717?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=15 and Y=717.
To find the number halfway between 15 and 717, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 717 into our formula, we get:
(15 + 717)/2 = 366
Thus, the number halfway between 15 and 717 is 366.
To check that our answer is correct, we subtract 15 from 366 and subtract 366 from 717 and compare the two numbers:
366 - 15 = 351
717 - 366 = 351
As you can see, the halfway number is 351 higher than 15 and 351 lower than 717. Therefore, our halfway between answer of 366 above is correct.
Halfway Between
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Halfway Between 15 and 718
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