When you ask "What number is halfway between 79 and 400?" 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=400.
To find the number halfway between 79 and 400, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 79 and 400 into our formula, we get:
(79 + 400)/2 = 239.5
Thus, the number halfway between 79 and 400 is 239.5.
To check that our answer is correct, we subtract 79 from 239.5 and subtract 239.5 from 400 and compare the two numbers:
239.5 - 79 = 160.5
400 - 239.5 = 160.5
As you can see, the halfway number is 160.5 higher than 79 and 160.5 lower than 400. Therefore, our halfway between answer of 239.5 above is correct.
Halfway Between
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Halfway Between 79 and 401
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