When you ask "What number is halfway between 20 and 395?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=20 and Y=395.
To find the number halfway between 20 and 395, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 395 into our formula, we get:
(20 + 395)/2 = 207.5
Thus, the number halfway between 20 and 395 is 207.5.
To check that our answer is correct, we subtract 20 from 207.5 and subtract 207.5 from 395 and compare the two numbers:
207.5 - 20 = 187.5
395 - 207.5 = 187.5
As you can see, the halfway number is 187.5 higher than 20 and 187.5 lower than 395. Therefore, our halfway between answer of 207.5 above is correct.
Halfway Between
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Halfway Between 20 and 396
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