When you ask "What number is halfway between 15 and 328?" 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=328.
To find the number halfway between 15 and 328, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 328 into our formula, we get:
(15 + 328)/2 = 171.5
Thus, the number halfway between 15 and 328 is 171.5.
To check that our answer is correct, we subtract 15 from 171.5 and subtract 171.5 from 328 and compare the two numbers:
171.5 - 15 = 156.5
328 - 171.5 = 156.5
As you can see, the halfway number is 156.5 higher than 15 and 156.5 lower than 328. Therefore, our halfway between answer of 171.5 above is correct.
Halfway Between
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Halfway Between 15 and 329
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