When you ask "What number is halfway between 99 and 477?" 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=477.
To find the number halfway between 99 and 477, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 477 into our formula, we get:
(99 + 477)/2 = 288
Thus, the number halfway between 99 and 477 is 288.
To check that our answer is correct, we subtract 99 from 288 and subtract 288 from 477 and compare the two numbers:
288 - 99 = 189
477 - 288 = 189
As you can see, the halfway number is 189 higher than 99 and 189 lower than 477. Therefore, our halfway between answer of 288 above is correct.
Halfway Between
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Halfway Between 99 and 478
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