Halfway Between 17 and 78

When you ask "What number is halfway between 17 and 78?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=17 and Y=78.

Halfway Between Line

To find the number halfway between 17 and 78, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 17 and 78 into our formula, we get:

(17 + 78)/2 = 47.5

Thus, the number halfway between 17 and 78 is 47.5.

To check that our answer is correct, we subtract 17 from 47.5 and subtract 47.5 from 78 and compare the two numbers:

47.5 - 17 = 30.5
78 - 47.5 = 30.5

As you can see, the halfway number is 30.5 higher than 17 and 30.5 lower than 78. Therefore, our halfway between answer of 47.5 above is correct.

Halfway Between
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Halfway Between 17 and 79
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