Halfway Between 15 and 620

When you ask "What number is halfway between 15 and 620?" 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=620.

Halfway Between Line

To find the number halfway between 15 and 620, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 15 and 620 into our formula, we get:

(15 + 620)/2 = 317.5

Thus, the number halfway between 15 and 620 is 317.5.

To check that our answer is correct, we subtract 15 from 317.5 and subtract 317.5 from 620 and compare the two numbers:

317.5 - 15 = 302.5
620 - 317.5 = 302.5

As you can see, the halfway number is 302.5 higher than 15 and 302.5 lower than 620. Therefore, our halfway between answer of 317.5 above is correct.

Halfway Between
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Halfway Between 15 and 621
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