When you ask "What number is halfway between 79 and 398?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=79 and Y=398.
To find the number halfway between 79 and 398, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 79 and 398 into our formula, we get:
(79 + 398)/2 = 238.5
Thus, the number halfway between 79 and 398 is 238.5.
To check that our answer is correct, we subtract 79 from 238.5 and subtract 238.5 from 398 and compare the two numbers:
238.5 - 79 = 159.5
398 - 238.5 = 159.5
As you can see, the halfway number is 159.5 higher than 79 and 159.5 lower than 398. Therefore, our halfway between answer of 238.5 above is correct.
Halfway Between
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Halfway Between 79 and 399
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