
When you ask "What number is halfway between 75 and 218?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=75 and Y=218.

To find the number halfway between 75 and 218, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 75 and 218 into our formula, we get:
(75 + 218)/2 = 146.5
Thus, the number halfway between 75 and 218 is 146.5.
To check that our answer is correct, we subtract 75 from 146.5 and subtract 146.5 from 218 and compare the two numbers:
146.5 - 75 = 71.5
218 - 146.5 = 71.5
As you can see, the halfway number is 71.5 higher than 75 and 71.5 lower than 218. Therefore, our halfway between answer of 146.5 above is correct.
Halfway Between
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Halfway Between 75 and 219
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