Halfway Between 66 and 87

When you ask "What number is halfway between 66 and 87?" 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=87.

Halfway Between Line

To find the number halfway between 66 and 87, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 66 and 87 into our formula, we get:

(66 + 87)/2 = 76.5

Thus, the number halfway between 66 and 87 is 76.5.

To check that our answer is correct, we subtract 66 from 76.5 and subtract 76.5 from 87 and compare the two numbers:

76.5 - 66 = 10.5
87 - 76.5 = 10.5

As you can see, the halfway number is 10.5 higher than 66 and 10.5 lower than 87. Therefore, our halfway between answer of 76.5 above is correct.

Halfway Between
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Halfway Between 66 and 88
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