Halfway Between 66 and 77

When you ask "What number is halfway between 66 and 77?" 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=77.

Halfway Between Line

To find the number halfway between 66 and 77, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 66 and 77 into our formula, we get:

(66 + 77)/2 = 71.5

Thus, the number halfway between 66 and 77 is 71.5.

To check that our answer is correct, we subtract 66 from 71.5 and subtract 71.5 from 77 and compare the two numbers:

71.5 - 66 = 5.5
77 - 71.5 = 5.5

As you can see, the halfway number is 5.5 higher than 66 and 5.5 lower than 77. Therefore, our halfway between answer of 71.5 above is correct.

Halfway Between
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Halfway Between 66 and 78
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