When you ask "What number is halfway between 99 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=99 and Y=480.
To find the number halfway between 99 and 480, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 480 into our formula, we get:
(99 + 480)/2 = 289.5
Thus, the number halfway between 99 and 480 is 289.5.
To check that our answer is correct, we subtract 99 from 289.5 and subtract 289.5 from 480 and compare the two numbers:
289.5 - 99 = 190.5
480 - 289.5 = 190.5
As you can see, the halfway number is 190.5 higher than 99 and 190.5 lower than 480. Therefore, our halfway between answer of 289.5 above is correct.
Halfway Between
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Halfway Between 99 and 481
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