When you ask "What number is halfway between 21 and 476?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=21 and Y=476.
To find the number halfway between 21 and 476, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 476 into our formula, we get:
(21 + 476)/2 = 248.5
Thus, the number halfway between 21 and 476 is 248.5.
To check that our answer is correct, we subtract 21 from 248.5 and subtract 248.5 from 476 and compare the two numbers:
248.5 - 21 = 227.5
476 - 248.5 = 227.5
As you can see, the halfway number is 227.5 higher than 21 and 227.5 lower than 476. Therefore, our halfway between answer of 248.5 above is correct.
Halfway Between
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Halfway Between 21 and 477
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