When you ask "What number is halfway between 28 and 421?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=28 and Y=421.
To find the number halfway between 28 and 421, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 28 and 421 into our formula, we get:
(28 + 421)/2 = 224.5
Thus, the number halfway between 28 and 421 is 224.5.
To check that our answer is correct, we subtract 28 from 224.5 and subtract 224.5 from 421 and compare the two numbers:
224.5 - 28 = 196.5
421 - 224.5 = 196.5
As you can see, the halfway number is 196.5 higher than 28 and 196.5 lower than 421. Therefore, our halfway between answer of 224.5 above is correct.
Halfway Between
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Halfway Between 28 and 422
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