When you ask "What number is halfway between 17 and 426?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=17 and Y=426.
To find the number halfway between 17 and 426, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 426 into our formula, we get:
(17 + 426)/2 = 221.5
Thus, the number halfway between 17 and 426 is 221.5.
To check that our answer is correct, we subtract 17 from 221.5 and subtract 221.5 from 426 and compare the two numbers:
221.5 - 17 = 204.5
426 - 221.5 = 204.5
As you can see, the halfway number is 204.5 higher than 17 and 204.5 lower than 426. Therefore, our halfway between answer of 221.5 above is correct.
Halfway Between
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Halfway Between 17 and 427
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