When you ask "What number is halfway between 77 and 242?" 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=242.
To find the number halfway between 77 and 242, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 77 and 242 into our formula, we get:
(77 + 242)/2 = 159.5
Thus, the number halfway between 77 and 242 is 159.5.
To check that our answer is correct, we subtract 77 from 159.5 and subtract 159.5 from 242 and compare the two numbers:
159.5 - 77 = 82.5
242 - 159.5 = 82.5
As you can see, the halfway number is 82.5 higher than 77 and 82.5 lower than 242. Therefore, our halfway between answer of 159.5 above is correct.
Halfway Between
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Halfway Between 77 and 243
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