When you ask "What number is halfway between 15 and 230?" 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=230.
To find the number halfway between 15 and 230, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 230 into our formula, we get:
(15 + 230)/2 = 122.5
Thus, the number halfway between 15 and 230 is 122.5.
To check that our answer is correct, we subtract 15 from 122.5 and subtract 122.5 from 230 and compare the two numbers:
122.5 - 15 = 107.5
230 - 122.5 = 107.5
As you can see, the halfway number is 107.5 higher than 15 and 107.5 lower than 230. Therefore, our halfway between answer of 122.5 above is correct.
Halfway Between
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Halfway Between 15 and 231
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