When you ask "What number is halfway between 20 and 97?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=20 and Y=97.
To find the number halfway between 20 and 97, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 97 into our formula, we get:
(20 + 97)/2 = 58.5
Thus, the number halfway between 20 and 97 is 58.5.
To check that our answer is correct, we subtract 20 from 58.5 and subtract 58.5 from 97 and compare the two numbers:
58.5 - 20 = 38.5
97 - 58.5 = 38.5
As you can see, the halfway number is 38.5 higher than 20 and 38.5 lower than 97. Therefore, our halfway between answer of 58.5 above is correct.
Halfway Between
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Halfway Between 20 and 98
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