When you ask "What number is halfway between 99 and 702?" 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=702.
To find the number halfway between 99 and 702, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 702 into our formula, we get:
(99 + 702)/2 = 400.5
Thus, the number halfway between 99 and 702 is 400.5.
To check that our answer is correct, we subtract 99 from 400.5 and subtract 400.5 from 702 and compare the two numbers:
400.5 - 99 = 301.5
702 - 400.5 = 301.5
As you can see, the halfway number is 301.5 higher than 99 and 301.5 lower than 702. Therefore, our halfway between answer of 400.5 above is correct.
Halfway Between
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