Halfway Between 20 and 660

When you ask "What number is halfway between 20 and 660?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=20 and Y=660.

Halfway Between Line

To find the number halfway between 20 and 660, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 20 and 660 into our formula, we get:

(20 + 660)/2 = 340

Thus, the number halfway between 20 and 660 is 340.

To check that our answer is correct, we subtract 20 from 340 and subtract 340 from 660 and compare the two numbers:

340 - 20 = 320
660 - 340 = 320

As you can see, the halfway number is 320 higher than 20 and 320 lower than 660. Therefore, our halfway between answer of 340 above is correct.

Halfway Between
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