When you ask "What number is halfway between 99 and 525?" 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=525.
To find the number halfway between 99 and 525, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 525 into our formula, we get:
(99 + 525)/2 = 312
Thus, the number halfway between 99 and 525 is 312.
To check that our answer is correct, we subtract 99 from 312 and subtract 312 from 525 and compare the two numbers:
312 - 99 = 213
525 - 312 = 213
As you can see, the halfway number is 213 higher than 99 and 213 lower than 525. Therefore, our halfway between answer of 312 above is correct.
Halfway Between
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Halfway Between 99 and 526
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