When you ask "What number is halfway between 99 and 504?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=99 and Y=504.
To find the number halfway between 99 and 504, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 504 into our formula, we get:
(99 + 504)/2 = 301.5
Thus, the number halfway between 99 and 504 is 301.5.
To check that our answer is correct, we subtract 99 from 301.5 and subtract 301.5 from 504 and compare the two numbers:
301.5 - 99 = 202.5
504 - 301.5 = 202.5
As you can see, the halfway number is 202.5 higher than 99 and 202.5 lower than 504. Therefore, our halfway between answer of 301.5 above is correct.
Halfway Between
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Halfway Between 99 and 505
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