When you ask "What number is halfway between 100 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=100 and Y=477.
To find the number halfway between 100 and 477, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 100 and 477 into our formula, we get:
(100 + 477)/2 = 288.5
Thus, the number halfway between 100 and 477 is 288.5.
To check that our answer is correct, we subtract 100 from 288.5 and subtract 288.5 from 477 and compare the two numbers:
288.5 - 100 = 188.5
477 - 288.5 = 188.5
As you can see, the halfway number is 188.5 higher than 100 and 188.5 lower than 477. Therefore, our halfway between answer of 288.5 above is correct.
Halfway Between
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Halfway Between 100 and 478
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