When you ask "What number is halfway between 99 and 300?" 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=300.
To find the number halfway between 99 and 300, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 300 into our formula, we get:
(99 + 300)/2 = 199.5
Thus, the number halfway between 99 and 300 is 199.5.
To check that our answer is correct, we subtract 99 from 199.5 and subtract 199.5 from 300 and compare the two numbers:
199.5 - 99 = 100.5
300 - 199.5 = 100.5
As you can see, the halfway number is 100.5 higher than 99 and 100.5 lower than 300. Therefore, our halfway between answer of 199.5 above is correct.
Halfway Between
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Halfway Between 99 and 301
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