When you ask "What number is halfway between 15 and 188?" 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=188.
To find the number halfway between 15 and 188, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 188 into our formula, we get:
(15 + 188)/2 = 101.5
Thus, the number halfway between 15 and 188 is 101.5.
To check that our answer is correct, we subtract 15 from 101.5 and subtract 101.5 from 188 and compare the two numbers:
101.5 - 15 = 86.5
188 - 101.5 = 86.5
As you can see, the halfway number is 86.5 higher than 15 and 86.5 lower than 188. Therefore, our halfway between answer of 101.5 above is correct.
Halfway Between
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Halfway Between 15 and 189
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