When you ask "What number is halfway between 63 and 400?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=63 and Y=400.
To find the number halfway between 63 and 400, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 63 and 400 into our formula, we get:
(63 + 400)/2 = 231.5
Thus, the number halfway between 63 and 400 is 231.5.
To check that our answer is correct, we subtract 63 from 231.5 and subtract 231.5 from 400 and compare the two numbers:
231.5 - 63 = 168.5
400 - 231.5 = 168.5
As you can see, the halfway number is 168.5 higher than 63 and 168.5 lower than 400. Therefore, our halfway between answer of 231.5 above is correct.
Halfway Between
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Halfway Between 63 and 401
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