When you ask "What number is halfway between 15 and 214?" 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=214.
To find the number halfway between 15 and 214, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 214 into our formula, we get:
(15 + 214)/2 = 114.5
Thus, the number halfway between 15 and 214 is 114.5.
To check that our answer is correct, we subtract 15 from 114.5 and subtract 114.5 from 214 and compare the two numbers:
114.5 - 15 = 99.5
214 - 114.5 = 99.5
As you can see, the halfway number is 99.5 higher than 15 and 99.5 lower than 214. Therefore, our halfway between answer of 114.5 above is correct.
Halfway Between
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Halfway Between 15 and 215
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