Halfway Between 15 and 387

When you ask "What number is halfway between 15 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=15 and Y=387.

Halfway Between Line

To find the number halfway between 15 and 387, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 15 and 387 into our formula, we get:

(15 + 387)/2 = 201

Thus, the number halfway between 15 and 387 is 201.

To check that our answer is correct, we subtract 15 from 201 and subtract 201 from 387 and compare the two numbers:

201 - 15 = 186
387 - 201 = 186

As you can see, the halfway number is 186 higher than 15 and 186 lower than 387. Therefore, our halfway between answer of 201 above is correct.

Halfway Between
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Halfway Between 15 and 388
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