When you ask "What number is halfway between 21 and 760?" 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=760.
To find the number halfway between 21 and 760, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 760 into our formula, we get:
(21 + 760)/2 = 390.5
Thus, the number halfway between 21 and 760 is 390.5.
To check that our answer is correct, we subtract 21 from 390.5 and subtract 390.5 from 760 and compare the two numbers:
390.5 - 21 = 369.5
760 - 390.5 = 369.5
As you can see, the halfway number is 369.5 higher than 21 and 369.5 lower than 760. Therefore, our halfway between answer of 390.5 above is correct.
Halfway Between
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Halfway Between 21 and 761
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