When you ask "What number is halfway between 25 and 402?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=25 and Y=402.
To find the number halfway between 25 and 402, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 402 into our formula, we get:
(25 + 402)/2 = 213.5
Thus, the number halfway between 25 and 402 is 213.5.
To check that our answer is correct, we subtract 25 from 213.5 and subtract 213.5 from 402 and compare the two numbers:
213.5 - 25 = 188.5
402 - 213.5 = 188.5
As you can see, the halfway number is 188.5 higher than 25 and 188.5 lower than 402. Therefore, our halfway between answer of 213.5 above is correct.
Halfway Between
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Halfway Between 25 and 403
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