When you ask "What number is halfway between 21 and 114?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=21 and Y=114.
To find the number halfway between 21 and 114, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 114 into our formula, we get:
(21 + 114)/2 = 67.5
Thus, the number halfway between 21 and 114 is 67.5.
To check that our answer is correct, we subtract 21 from 67.5 and subtract 67.5 from 114 and compare the two numbers:
67.5 - 21 = 46.5
114 - 67.5 = 46.5
As you can see, the halfway number is 46.5 higher than 21 and 46.5 lower than 114. Therefore, our halfway between answer of 67.5 above is correct.
Halfway Between
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Halfway Between 21 and 115
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