When you ask "What number is halfway between 99 and 338?" 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=338.
To find the number halfway between 99 and 338, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 338 into our formula, we get:
(99 + 338)/2 = 218.5
Thus, the number halfway between 99 and 338 is 218.5.
To check that our answer is correct, we subtract 99 from 218.5 and subtract 218.5 from 338 and compare the two numbers:
218.5 - 99 = 119.5
338 - 218.5 = 119.5
As you can see, the halfway number is 119.5 higher than 99 and 119.5 lower than 338. Therefore, our halfway between answer of 218.5 above is correct.
Halfway Between
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Halfway Between 99 and 339
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