When you ask "What number is halfway between 12 and 115?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=12 and Y=115.
To find the number halfway between 12 and 115, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 12 and 115 into our formula, we get:
(12 + 115)/2 = 63.5
Thus, the number halfway between 12 and 115 is 63.5.
To check that our answer is correct, we subtract 12 from 63.5 and subtract 63.5 from 115 and compare the two numbers:
63.5 - 12 = 51.5
115 - 63.5 = 51.5
As you can see, the halfway number is 51.5 higher than 12 and 51.5 lower than 115. Therefore, our halfway between answer of 63.5 above is correct.
Halfway Between
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Halfway Between 12 and 116
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