When you ask "What number is halfway between 97 and 391?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=97 and Y=391.
To find the number halfway between 97 and 391, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 97 and 391 into our formula, we get:
(97 + 391)/2 = 244
Thus, the number halfway between 97 and 391 is 244.
To check that our answer is correct, we subtract 97 from 244 and subtract 244 from 391 and compare the two numbers:
244 - 97 = 147
391 - 244 = 147
As you can see, the halfway number is 147 higher than 97 and 147 lower than 391. Therefore, our halfway between answer of 244 above is correct.
Halfway Between
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Halfway Between 97 and 392
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