When you ask "What number is halfway between 27 and 118?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=27 and Y=118.
To find the number halfway between 27 and 118, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 27 and 118 into our formula, we get:
(27 + 118)/2 = 72.5
Thus, the number halfway between 27 and 118 is 72.5.
To check that our answer is correct, we subtract 27 from 72.5 and subtract 72.5 from 118 and compare the two numbers:
72.5 - 27 = 45.5
118 - 72.5 = 45.5
As you can see, the halfway number is 45.5 higher than 27 and 45.5 lower than 118. Therefore, our halfway between answer of 72.5 above is correct.
Halfway Between
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Halfway Between 27 and 119
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