Halfway Between 78 and 421

When you ask "What number is halfway between 78 and 421?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=78 and Y=421.

Halfway Between Line

To find the number halfway between 78 and 421, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 78 and 421 into our formula, we get:

(78 + 421)/2 = 249.5

Thus, the number halfway between 78 and 421 is 249.5.

To check that our answer is correct, we subtract 78 from 249.5 and subtract 249.5 from 421 and compare the two numbers:

249.5 - 78 = 171.5
421 - 249.5 = 171.5

As you can see, the halfway number is 171.5 higher than 78 and 171.5 lower than 421. Therefore, our halfway between answer of 249.5 above is correct.

Halfway Between
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Halfway Between 78 and 422
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