When you ask "What number is halfway between 99 and 272?" 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=272.
To find the number halfway between 99 and 272, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 272 into our formula, we get:
(99 + 272)/2 = 185.5
Thus, the number halfway between 99 and 272 is 185.5.
To check that our answer is correct, we subtract 99 from 185.5 and subtract 185.5 from 272 and compare the two numbers:
185.5 - 99 = 86.5
272 - 185.5 = 86.5
As you can see, the halfway number is 86.5 higher than 99 and 86.5 lower than 272. Therefore, our halfway between answer of 185.5 above is correct.
Halfway Between
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Halfway Between 99 and 273
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