When you ask "What number is halfway between 99 and 306?" 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=306.
To find the number halfway between 99 and 306, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 306 into our formula, we get:
(99 + 306)/2 = 202.5
Thus, the number halfway between 99 and 306 is 202.5.
To check that our answer is correct, we subtract 99 from 202.5 and subtract 202.5 from 306 and compare the two numbers:
202.5 - 99 = 103.5
306 - 202.5 = 103.5
As you can see, the halfway number is 103.5 higher than 99 and 103.5 lower than 306. Therefore, our halfway between answer of 202.5 above is correct.
Halfway Between
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Halfway Between 99 and 307
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