When you ask "What number is halfway between 21 and 473?" 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=473.
To find the number halfway between 21 and 473, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 473 into our formula, we get:
(21 + 473)/2 = 247
Thus, the number halfway between 21 and 473 is 247.
To check that our answer is correct, we subtract 21 from 247 and subtract 247 from 473 and compare the two numbers:
247 - 21 = 226
473 - 247 = 226
As you can see, the halfway number is 226 higher than 21 and 226 lower than 473. Therefore, our halfway between answer of 247 above is correct.
Halfway Between
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Halfway Between 21 and 474
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