When you ask "What number is halfway between 77 and 230?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=77 and Y=230.
To find the number halfway between 77 and 230, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 77 and 230 into our formula, we get:
(77 + 230)/2 = 153.5
Thus, the number halfway between 77 and 230 is 153.5.
To check that our answer is correct, we subtract 77 from 153.5 and subtract 153.5 from 230 and compare the two numbers:
153.5 - 77 = 76.5
230 - 153.5 = 76.5
As you can see, the halfway number is 76.5 higher than 77 and 76.5 lower than 230. Therefore, our halfway between answer of 153.5 above is correct.
Halfway Between
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Halfway Between 77 and 231
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