When you ask "What number is halfway between 77 and 480?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=77 and Y=480.
To find the number halfway between 77 and 480, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 77 and 480 into our formula, we get:
(77 + 480)/2 = 278.5
Thus, the number halfway between 77 and 480 is 278.5.
To check that our answer is correct, we subtract 77 from 278.5 and subtract 278.5 from 480 and compare the two numbers:
278.5 - 77 = 201.5
480 - 278.5 = 201.5
As you can see, the halfway number is 201.5 higher than 77 and 201.5 lower than 480. Therefore, our halfway between answer of 278.5 above is correct.
Halfway Between
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Halfway Between 77 and 481
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