When you ask "What number is halfway between 40 and 207?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=40 and Y=207.
To find the number halfway between 40 and 207, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 40 and 207 into our formula, we get:
(40 + 207)/2 = 123.5
Thus, the number halfway between 40 and 207 is 123.5.
To check that our answer is correct, we subtract 40 from 123.5 and subtract 123.5 from 207 and compare the two numbers:
123.5 - 40 = 83.5
207 - 123.5 = 83.5
As you can see, the halfway number is 83.5 higher than 40 and 83.5 lower than 207. Therefore, our halfway between answer of 123.5 above is correct.
Halfway Between
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Halfway Between 40 and 208
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