Halfway Between 21 and 387

When you ask "What number is halfway between 21 and 387?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=21 and Y=387.

Halfway Between Line

To find the number halfway between 21 and 387, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 21 and 387 into our formula, we get:

(21 + 387)/2 = 204

Thus, the number halfway between 21 and 387 is 204.

To check that our answer is correct, we subtract 21 from 204 and subtract 204 from 387 and compare the two numbers:

204 - 21 = 183
387 - 204 = 183

As you can see, the halfway number is 183 higher than 21 and 183 lower than 387. Therefore, our halfway between answer of 204 above is correct.

Halfway Between
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Halfway Between 21 and 388
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