
When you ask "What number is halfway between 43 and 401?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=43 and Y=401.

To find the number halfway between 43 and 401, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 43 and 401 into our formula, we get:
(43 + 401)/2 = 222
Thus, the number halfway between 43 and 401 is 222.
To check that our answer is correct, we subtract 43 from 222 and subtract 222 from 401 and compare the two numbers:
222 - 43 = 179
401 - 222 = 179
As you can see, the halfway number is 179 higher than 43 and 179 lower than 401. Therefore, our halfway between answer of 222 above is correct.
Halfway Between
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Halfway Between 43 and 402
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