When you ask "What number is halfway between 21 and 794?" 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=794.
To find the number halfway between 21 and 794, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 794 into our formula, we get:
(21 + 794)/2 = 407.5
Thus, the number halfway between 21 and 794 is 407.5.
To check that our answer is correct, we subtract 21 from 407.5 and subtract 407.5 from 794 and compare the two numbers:
407.5 - 21 = 386.5
794 - 407.5 = 386.5
As you can see, the halfway number is 386.5 higher than 21 and 386.5 lower than 794. Therefore, our halfway between answer of 407.5 above is correct.
Halfway Between
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Halfway Between 21 and 795
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