When you ask "What number is halfway between 68 and 115?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=68 and Y=115.
To find the number halfway between 68 and 115, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 68 and 115 into our formula, we get:
(68 + 115)/2 = 91.5
Thus, the number halfway between 68 and 115 is 91.5.
To check that our answer is correct, we subtract 68 from 91.5 and subtract 91.5 from 115 and compare the two numbers:
91.5 - 68 = 23.5
115 - 91.5 = 23.5
As you can see, the halfway number is 23.5 higher than 68 and 23.5 lower than 115. Therefore, our halfway between answer of 91.5 above is correct.
Halfway Between
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Halfway Between 68 and 116
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