When you ask "What number is halfway between 15 and 286?" 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=286.
To find the number halfway between 15 and 286, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 286 into our formula, we get:
(15 + 286)/2 = 150.5
Thus, the number halfway between 15 and 286 is 150.5.
To check that our answer is correct, we subtract 15 from 150.5 and subtract 150.5 from 286 and compare the two numbers:
150.5 - 15 = 135.5
286 - 150.5 = 135.5
As you can see, the halfway number is 135.5 higher than 15 and 135.5 lower than 286. Therefore, our halfway between answer of 150.5 above is correct.
Halfway Between
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Halfway Between 15 and 287
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