When you ask "What number is halfway between 97 and 278?" 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=278.
To find the number halfway between 97 and 278, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 97 and 278 into our formula, we get:
(97 + 278)/2 = 187.5
Thus, the number halfway between 97 and 278 is 187.5.
To check that our answer is correct, we subtract 97 from 187.5 and subtract 187.5 from 278 and compare the two numbers:
187.5 - 97 = 90.5
278 - 187.5 = 90.5
As you can see, the halfway number is 90.5 higher than 97 and 90.5 lower than 278. Therefore, our halfway between answer of 187.5 above is correct.
Halfway Between
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Halfway Between 97 and 279
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