When you ask "What number is halfway between 16 and 403?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=16 and Y=403.
To find the number halfway between 16 and 403, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 16 and 403 into our formula, we get:
(16 + 403)/2 = 209.5
Thus, the number halfway between 16 and 403 is 209.5.
To check that our answer is correct, we subtract 16 from 209.5 and subtract 209.5 from 403 and compare the two numbers:
209.5 - 16 = 193.5
403 - 209.5 = 193.5
As you can see, the halfway number is 193.5 higher than 16 and 193.5 lower than 403. Therefore, our halfway between answer of 209.5 above is correct.
Halfway Between
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Halfway Between 16 and 404
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