When you ask "What number is halfway between 80 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=80 and Y=207.
To find the number halfway between 80 and 207, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 80 and 207 into our formula, we get:
(80 + 207)/2 = 143.5
Thus, the number halfway between 80 and 207 is 143.5.
To check that our answer is correct, we subtract 80 from 143.5 and subtract 143.5 from 207 and compare the two numbers:
143.5 - 80 = 63.5
207 - 143.5 = 63.5
As you can see, the halfway number is 63.5 higher than 80 and 63.5 lower than 207. Therefore, our halfway between answer of 143.5 above is correct.
Halfway Between
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Halfway Between 80 and 208
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