When you ask "What number is halfway between 99 and 676?" 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=676.
To find the number halfway between 99 and 676, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 676 into our formula, we get:
(99 + 676)/2 = 387.5
Thus, the number halfway between 99 and 676 is 387.5.
To check that our answer is correct, we subtract 99 from 387.5 and subtract 387.5 from 676 and compare the two numbers:
387.5 - 99 = 288.5
676 - 387.5 = 288.5
As you can see, the halfway number is 288.5 higher than 99 and 288.5 lower than 676. Therefore, our halfway between answer of 387.5 above is correct.
Halfway Between
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Halfway Between 99 and 677
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