When you ask "What number is halfway between 91 and 478?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=91 and Y=478.
To find the number halfway between 91 and 478, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 91 and 478 into our formula, we get:
(91 + 478)/2 = 284.5
Thus, the number halfway between 91 and 478 is 284.5.
To check that our answer is correct, we subtract 91 from 284.5 and subtract 284.5 from 478 and compare the two numbers:
284.5 - 91 = 193.5
478 - 284.5 = 193.5
As you can see, the halfway number is 193.5 higher than 91 and 193.5 lower than 478. Therefore, our halfway between answer of 284.5 above is correct.
Halfway Between
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Halfway Between 91 and 479
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