When you ask "What number is halfway between 99 and 591?" 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=591.
To find the number halfway between 99 and 591, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 591 into our formula, we get:
(99 + 591)/2 = 345
Thus, the number halfway between 99 and 591 is 345.
To check that our answer is correct, we subtract 99 from 345 and subtract 345 from 591 and compare the two numbers:
345 - 99 = 246
591 - 345 = 246
As you can see, the halfway number is 246 higher than 99 and 246 lower than 591. Therefore, our halfway between answer of 345 above is correct.
Halfway Between
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Halfway Between 99 and 592
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