Halfway Between 66 and 78

When you ask "What number is halfway between 66 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=66 and Y=78.

Halfway Between Line

To find the number halfway between 66 and 78, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 66 and 78 into our formula, we get:

(66 + 78)/2 = 72

Thus, the number halfway between 66 and 78 is 72.

To check that our answer is correct, we subtract 66 from 72 and subtract 72 from 78 and compare the two numbers:

72 - 66 = 6
78 - 72 = 6

As you can see, the halfway number is 6 higher than 66 and 6 lower than 78. Therefore, our halfway between answer of 72 above is correct.

Halfway Between
Find halfway between two other numbers here!

Halfway Between 66 and 79
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