When you ask "What number is halfway between 21 and 520?" 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=520.
To find the number halfway between 21 and 520, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 520 into our formula, we get:
(21 + 520)/2 = 270.5
Thus, the number halfway between 21 and 520 is 270.5.
To check that our answer is correct, we subtract 21 from 270.5 and subtract 270.5 from 520 and compare the two numbers:
270.5 - 21 = 249.5
520 - 270.5 = 249.5
As you can see, the halfway number is 249.5 higher than 21 and 249.5 lower than 520. Therefore, our halfway between answer of 270.5 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 21 and 521
Here is our next Halfway Between calculation.
Copyright | Privacy Policy | Disclaimer | Contact