When you ask "What number is halfway between 72 and 117?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=72 and Y=117.
To find the number halfway between 72 and 117, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 72 and 117 into our formula, we get:
(72 + 117)/2 = 94.5
Thus, the number halfway between 72 and 117 is 94.5.
To check that our answer is correct, we subtract 72 from 94.5 and subtract 94.5 from 117 and compare the two numbers:
94.5 - 72 = 22.5
117 - 94.5 = 22.5
As you can see, the halfway number is 22.5 higher than 72 and 22.5 lower than 117. Therefore, our halfway between answer of 94.5 above is correct.
Halfway Between
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Halfway Between 72 and 118
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